rand（）&srand（） 小咪咪 2022-07-15 05:54 163阅读 0赞 一、rand() 函数名: rand 功 能: 随机数发生器 用 法: int rand(void); 所在头文件: stdlib.h 函数说明 : * rand()的内部实现是用线性同余法做的，它不是真的随机数，因其周期特别长，故在 * 一定的范围里可看成是随机的。 * rand()返回一随机数值的范围在0至RAND\_MAX 间。RAND\_MAX的范围最少是在 * 32767之间(int)。用 unsigned int 双字节是65535，四字节是4294967295的整数 * 范围。0~RAND\_MAX每个数字被选中的机率是相同的。 * 用户未设定随机数种子时，系统默认的随机数种子为1。 * rand()产生的是伪随机数字，每次执行时是相同的;若要不同,用函数srand()初始化它。 程序示例: <table style="margin-left: 0px; font-size: 13px; border: none !important; margin-top: 0px !important; margin-right: 0px !important; margin-bottom: 0px !important; padding: 0px !important; border-collapse: collapse !important; border-spacing: 0px !important; width: auto !important; table-layout: auto !important; background: none !important;"> <tbody style="border: 0px; margin: 0px; padding: 0px;"> <tr style="border: none !important; margin: 0px !important; padding: 0px !important; vertical-align: top !important; background: none;"> <td style="font-size: 13px; text-align: center; border: none !important; margin: 0px !important; padding: 0px !important; vertical-align: top !important; font-family: Monaco, MonacoRegular, 'Courier New', monospace !important; background-image: none; background-attachment: initial; background-color: rgb(238, 238, 238) !important; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <div style="border: none; margin: 0px; padding-right: 0px; padding-left: 0px; text-align: left; white-space: nowrap; padding-top: 5px !important; padding-bottom: 3px !important; line-height: 15px !important; background: none;"> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 1 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 2 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 3 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 4 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 5 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 6 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 7 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 8 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 9 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 10 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 11 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 12 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 13 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 14 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 15 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 16 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 17 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 18 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 19 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 20 </div> </div></td> <td style="font-size: 13px; text-align: center; width: 581px; border: none !important; margin: 0px !important; padding: 0px !important; vertical-align: top !important; font-family: Monaco, MonacoRegular, 'Courier New', monospace !important; background: none;"> <div style="margin: 0px; padding-right: 0px; padding-left: 0px; text-align: left; white-space: pre; overflow: visible; tab-size: 4; border: none !important; padding-top: 5px !important; padding-bottom: 3px !important; line-height: 15px !important; background: none !important;"> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(184, 92, 0) !important;">#include <iostream> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: teal !important;">using </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: bold !important; color: rgb(128, 0, 128) !important;">namespace</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 45, 122) !important;">std</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">;</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(184, 92, 0) !important;">#include <stdlib.h> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(184, 92, 0) !important;">#include <time.h> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(184, 92, 0) !important;">#define MIN 1 //随机数产生的范围 </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(184, 92, 0) !important;">#define MAX 10 </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: bold !important; color: rgb(128, 0, 128) !important;">int</span> <span style="border: 0px; margin: 0px; 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line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">{ </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: bold !important; color: rgb(128, 0, 128) !important;">int</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 45, 122) !important;">i</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">;</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: teal !important;">srand</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">(</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">(</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: bold !important; color: rgb(128, 0, 128) !important;">unsigned</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">)</span> <span style="border: 0px; 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height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">)</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">;</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 45, 122) !important;">cout</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"><<</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(221, 17, 68) !important;">"Ten random numbers from "</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"><<</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 45, 122) !important;">MIN</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"><<</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(221, 17, 68) !important;">" to "</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"><<</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 45, 122) !important;">MAX</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"><<</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(221, 17, 68) !important;">" :/n"</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"><<</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 45, 122) !important;">endl</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">;</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: bold !important;">for</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">(</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 45, 122) !important;">i</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;">=</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 153, 153) !important;">0</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">;</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 45, 122) !important;">i</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"><</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 153, 153) !important;">10</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">;</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 45, 122) !important;">i</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;">++</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">)</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(153, 153, 153) !important; font-style: italic !important;">//产生随机数 </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">{ </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 45, 122) !important;">cout</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"><<</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 45, 122) !important;">MIN</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;">+</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">(</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: bold !important; color: rgb(128, 0, 128) !important;">int</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">)</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: teal !important;">MAX *</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: teal !important;">rand</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">(</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">)</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;">/</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">(</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 45, 122) !important;">RAND_MAX</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;">+</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 153, 153) !important;">1</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">)</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"><<</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(221, 17, 68) !important;">"/t"</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">;</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">}</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 45, 122) !important;">cout</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"><<</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 45, 122) !important;">endl</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">;</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: bold !important;">return</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 153, 153) !important;">0</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">;</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">}</span> </div> </div></td> </tr> </tbody> </table> 二、srand() 函数名: srand 功 能: 初始化随机数发生器 用 法: void srand(unsigned int seed); 所在头文件： stdlib.h 函数说明： * srand()用来设置rand()产生随机数时的随机数种子。 * 参数seed必须是个整数，通常可以利用time(0)的返回值或NULL来当做seed。 * 如果每次seed都设相同值，rand()所产生的随机数值每次就会一样。 程序示例: <table style="margin-left:0px; font-size:13px; border:none!important; margin-top:0px!important; margin-right:0px!important; margin-bottom:0px!important; padding:0px!important; border-collapse:collapse!important; border-spacing:0px!important; width:auto!important; table-layout:auto!important; background:none!important"> <tbody style="border:0px; margin:0px; padding:0px"> <tr style="border:none!important; margin:0px!important; padding:0px!important; vertical-align:top!important; background:none"> <td style="font-size:13px; text-align:center; border:none!important; margin:0px!important; padding:0px!important; vertical-align:top!important; font-family:Monaco,MonacoRegular,'Courier New',monospace!important; background-color:rgb(238,238,238)!important"> <div style="border:none; margin:0px; padding-right:0px; padding-left:0px; text-align:left; white-space:nowrap; padding-top:5px!important; padding-bottom:3px!important; line-height:15px!important; background:none"> <div style="border-right-width:1px!important; border-top-style:none; border-right-style:solid!important; border-bottom-style:none; border-left-style:none; border-right-color:rgb(222,222,222)!important; margin:0px; padding:0px 5px; font-size:inherit!important; font-family:inherit; text-align:right!important; height:inherit; line-height:inherit!important; font-weight:inherit!important; min-width:1.2em!important; color:rgb(170,170,170)!important; background:none"> 1 </div> <div style="border-right-width:1px!important; border-top-style:none; border-right-style:solid!important; border-bottom-style:none; border-left-style:none; border-right-color:rgb(222,222,222)!important; margin:0px; padding:0px 5px; font-size:inherit!important; font-family:inherit; text-align:right!important; height:inherit; line-height:inherit!important; font-weight:inherit!important; min-width:1.2em!important; color:rgb(170,170,170)!important; background:none"> 2 </div> <div style="border-right-width:1px!important; border-top-style:none; border-right-style:solid!important; border-bottom-style:none; border-left-style:none; border-right-color:rgb(222,222,222)!important; margin:0px; padding:0px 5px; font-size:inherit!important; font-family:inherit; text-align:right!important; height:inherit; line-height:inherit!important; font-weight:inherit!important; min-width:1.2em!important; color:rgb(170,170,170)!important; background:none"> 3 </div> <div style="border-right-width:1px!important; border-top-style:none; border-right-style:solid!important; border-bottom-style:none; border-left-style:none; border-right-color:rgb(222,222,222)!important; margin:0px; padding:0px 5px; font-size:inherit!important; font-family:inherit; text-align:right!important; height:inherit; line-height:inherit!important; font-weight:inherit!important; min-width:1.2em!important; color:rgb(170,170,170)!important; background:none"> 4 </div> <div style="border-right-width:1px!important; border-top-style:none; border-right-style:solid!important; border-bottom-style:none; border-left-style:none; border-right-color:rgb(222,222,222)!important; margin:0px; padding:0px 5px; font-size:inherit!important; font-family:inherit; text-align:right!important; height:inherit; line-height:inherit!important; font-weight:inherit!important; min-width:1.2em!important; color:rgb(170,170,170)!important; background:none"> 5 </div> <div style="border-right-width:1px!important; border-top-style:none; border-right-style:solid!important; border-bottom-style:none; border-left-style:none; border-right-color:rgb(222,222,222)!important; margin:0px; padding:0px 5px; font-size:inherit!important; font-family:inherit; text-align:right!important; height:inherit; line-height:inherit!important; font-weight:inherit!important; min-width:1.2em!important; color:rgb(170,170,170)!important; background:none"> 6 </div> <div style="border-right-width:1px!important; border-top-style:none; border-right-style:solid!important; border-bottom-style:none; border-left-style:none; border-right-color:rgb(222,222,222)!important; margin:0px; padding:0px 5px; font-size:inherit!important; font-family:inherit; text-align:right!important; height:inherit; line-height:inherit!important; font-weight:inherit!important; min-width:1.2em!important; color:rgb(170,170,170)!important; background:none"> 7 </div> <div style="border-right-width:1px!important; border-top-style:none; border-right-style:solid!important; border-bottom-style:none; border-left-style:none; border-right-color:rgb(222,222,222)!important; margin:0px; padding:0px 5px; font-size:inherit!important; font-family:inherit; text-align:right!important; height:inherit; line-height:inherit!important; font-weight:inherit!important; min-width:1.2em!important; color:rgb(170,170,170)!important; background:none"> 8 </div> <div style="border-right-width:1px!important; border-top-style:none; border-right-style:solid!important; border-bottom-style:none; border-left-style:none; border-right-color:rgb(222,222,222)!important; margin:0px; padding:0px 5px; font-size:inherit!important; font-family:inherit; text-align:right!important; height:inherit; line-height:inherit!important; font-weight:inherit!important; min-width:1.2em!important; color:rgb(170,170,170)!important; background:none"> 9 </div> <div style="border-right-width:1px!important; border-top-style:none; border-right-style:solid!important; border-bottom-style:none; border-left-style:none; border-right-color:rgb(222,222,222)!important; margin:0px; padding:0px 5px; font-size:inherit!important; font-family:inherit; text-align:right!important; height:inherit; line-height:inherit!important; font-weight:inherit!important; min-width:1.2em!important; color:rgb(170,170,170)!important; background:none"> 10 </div> <div style="border-right-width:1px!important; border-top-style:none; border-right-style:solid!important; border-bottom-style:none; border-left-style:none; border-right-color:rgb(222,222,222)!important; margin:0px; padding:0px 5px; font-size:inherit!important; font-family:inherit; text-align:right!important; height:inherit; line-height:inherit!important; font-weight:inherit!important; min-width:1.2em!important; color:rgb(170,170,170)!important; background:none"> 11 </div> <div style="border-right-width:1px!important; border-top-style:none; border-right-style:solid!important; border-bottom-style:none; border-left-style:none; border-right-color:rgb(222,222,222)!important; margin:0px; padding:0px 5px; font-size:inherit!important; font-family:inherit; text-align:right!important; height:inherit; line-height:inherit!important; font-weight:inherit!important; min-width:1.2em!important; color:rgb(170,170,170)!important; background:none"> 12 </div> <div style="border-right-width:1px!important; border-top-style:none; border-right-style:solid!important; border-bottom-style:none; border-left-style:none; border-right-color:rgb(222,222,222)!important; margin:0px; padding:0px 5px; font-size:inherit!important; font-family:inherit; text-align:right!important; height:inherit; line-height:inherit!important; font-weight:inherit!important; min-width:1.2em!important; color:rgb(170,170,170)!important; background:none"> 13 </div> <div style="border-right-width:1px!important; border-top-style:none; border-right-style:solid!important; border-bottom-style:none; border-left-style:none; border-right-color:rgb(222,222,222)!important; margin:0px; padding:0px 5px; font-size:inherit!important; font-family:inherit; text-align:right!important; height:inherit; line-height:inherit!important; font-weight:inherit!important; min-width:1.2em!important; color:rgb(170,170,170)!important; background:none"> 14 </div> <div style="border-right-width:1px!important; border-top-style:none; border-right-style:solid!important; border-bottom-style:none; border-left-style:none; border-right-color:rgb(222,222,222)!important; margin:0px; padding:0px 5px; font-size:inherit!important; font-family:inherit; text-align:right!important; height:inherit; line-height:inherit!important; font-weight:inherit!important; min-width:1.2em!important; color:rgb(170,170,170)!important; background:none"> 15 </div> <div style="border-right-width:1px!important; border-top-style:none; border-right-style:solid!important; border-bottom-style:none; border-left-style:none; border-right-color:rgb(222,222,222)!important; margin:0px; padding:0px 5px; font-size:inherit!important; font-family:inherit; text-align:right!important; height:inherit; line-height:inherit!important; font-weight:inherit!important; min-width:1.2em!important; color:rgb(170,170,170)!important; background:none"> 16 </div> <div style="border-right-width:1px!important; border-top-style:none; border-right-style:solid!important; border-bottom-style:none; border-left-style:none; border-right-color:rgb(222,222,222)!important; margin:0px; padding:0px 5px; font-size:inherit!important; font-family:inherit; text-align:right!important; height:inherit; line-height:inherit!important; font-weight:inherit!important; min-width:1.2em!important; color:rgb(170,170,170)!important; background:none"> 17 </div> <div style="border-right-width:1px!important; border-top-style:none; border-right-style:solid!important; border-bottom-style:none; border-left-style:none; border-right-color:rgb(222,222,222)!important; margin:0px; padding:0px 5px; font-size:inherit!important; font-family:inherit; text-align:right!important; height:inherit; line-height:inherit!important; font-weight:inherit!important; min-width:1.2em!important; color:rgb(170,170,170)!important; background:none"> 18 </div> <div style="border-right-width:1px!important; border-top-style:none; border-right-style:solid!important; border-bottom-style:none; border-left-style:none; border-right-color:rgb(222,222,222)!important; margin:0px; padding:0px 5px; font-size:inherit!important; font-family:inherit; text-align:right!important; height:inherit; line-height:inherit!important; font-weight:inherit!important; min-width:1.2em!important; color:rgb(170,170,170)!important; background:none"> 19 </div> <div style="border-right-width:1px!important; border-top-style:none; border-right-style:solid!important; border-bottom-style:none; border-left-style:none; border-right-color:rgb(222,222,222)!important; margin:0px; padding:0px 5px; font-size:inherit!important; font-family:inherit; text-align:right!important; height:inherit; line-height:inherit!important; font-weight:inherit!important; min-width:1.2em!important; color:rgb(170,170,170)!important; background:none"> 20 </div> </div> </td> <td style="font-size:13px; text-align:center; width:581px; border:none!important; margin:0px!important; padding:0px!important; vertical-align:top!important; font-family:Monaco,MonacoRegular,'Courier New',monospace!important; background:none"> <div style="margin:0px; padding-right:0px; padding-left:0px; text-align:left; white-space:pre; overflow:visible; border:none!important; padding-top:5px!important; padding-bottom:3px!important; line-height:15px!important; background:none!important"> <div style="border:none; margin:0px; padding:0px 5px; font-family:inherit; height:inherit; font-size:inherit!important; line-height:inherit!important; font-weight:inherit!important; background:none"> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(184,92,0)!important">#include <iostream> </span> </div> <div style="border:none; margin:0px; padding:0px 5px; font-family:inherit; height:inherit; font-size:inherit!important; line-height:inherit!important; font-weight:inherit!important; background:none"> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:teal!important">using </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:bold!important; color:rgb(128,0,128)!important">namespace</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,45,122)!important">std</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(51,51,51)!important">;</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> </div> <div style="border:none; margin:0px; padding:0px 5px; font-family:inherit; height:inherit; font-size:inherit!important; line-height:inherit!important; font-weight:inherit!important; background:none"> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(184,92,0)!important">#include <stdlib.h> </span> </div> <div style="border:none; margin:0px; padding:0px 5px; font-family:inherit; height:inherit; font-size:inherit!important; line-height:inherit!important; font-weight:inherit!important; background:none"> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(184,92,0)!important">#include <time.h> </span> </div> <div style="border:none; margin:0px; padding:0px 5px; font-family:inherit; height:inherit; font-size:inherit!important; line-height:inherit!important; font-weight:inherit!important; background:none"> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(184,92,0)!important">#define MIN 0 //随机数产生的范围 </span> </div> <div style="border:none; margin:0px; padding:0px 5px; font-family:inherit; height:inherit; font-size:inherit!important; line-height:inherit!important; font-weight:inherit!important; background:none"> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(184,92,0)!important">#define MAX 99 </span> </div> <div style="border:none; margin:0px; padding:0px 5px; font-family:inherit; height:inherit; font-size:inherit!important; line-height:inherit!important; font-weight:inherit!important; background:none"> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> </div> <div style="border:none; margin:0px; padding:0px 5px; font-family:inherit; height:inherit; font-size:inherit!important; line-height:inherit!important; font-weight:inherit!important; background:none"> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:bold!important; color:rgb(128,0,128)!important">int</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:teal!important">main</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(51,51,51)!important">(</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(51,51,51)!important">)</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> </div> <div style="border:none; margin:0px; padding:0px 5px; font-family:inherit; height:inherit; font-size:inherit!important; line-height:inherit!important; font-weight:inherit!important; background:none"> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(51,51,51)!important">{ </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> </div> <div style="border:none; margin:0px; padding:0px 5px; font-family:inherit; height:inherit; font-size:inherit!important; line-height:inherit!important; font-weight:inherit!important; background:none"> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:bold!important; color:rgb(128,0,128)!important">int</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,45,122)!important">i</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(51,51,51)!important">;</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> </div> <div style="border:none; margin:0px; padding:0px 5px; font-family:inherit; height:inherit; font-size:inherit!important; line-height:inherit!important; font-weight:inherit!important; background:none"> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:teal!important">srand</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(51,51,51)!important">(</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(51,51,51)!important">(</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:bold!important; color:rgb(128,0,128)!important">unsigned</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(51,51,51)!important">)</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:teal!important">time</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(51,51,51)!important">(</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:bold!important; color:rgb(128,0,128)!important">NULL</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(51,51,51)!important">)</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(51,51,51)!important">)</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(51,51,51)!important">;</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> </div> <div style="border:none; margin:0px; padding:0px 5px; font-family:inherit; height:inherit; font-size:inherit!important; line-height:inherit!important; font-weight:inherit!important; background:none"> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,45,122)!important">cout</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"><<</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(221,17,68)!important">"Ten random numbers from "</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"><<</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,45,122)!important">MIN</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"><<</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> </div> <div style="border:none; margin:0px; padding:0px 5px; font-family:inherit; height:inherit; font-size:inherit!important; line-height:inherit!important; font-weight:inherit!important; background:none"> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(221,17,68)!important">" to "</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"><<</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,45,122)!important">MAX</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"><<</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(221,17,68)!important">" :/n"</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"><<</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,45,122)!important">endl</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(51,51,51)!important">;</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> </div> <div style="border:none; margin:0px; padding:0px 5px; 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margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(51,51,51)!important">;</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> </div> <div style="border:none; margin:0px; padding:0px 5px; font-family:inherit; height:inherit; font-size:inherit!important; line-height:inherit!important; font-weight:inherit!important; background:none"> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-family:inherit; height:inherit; font-size:inherit!important; line-height:inherit!important; font-weight:bold!important">return</span> <span style="border:0px; 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font-weight:inherit!important; background:none"> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(51,51,51)!important">}</span> </div> </div> </td> </tr> </tbody> </table> 三、rand()和srand()的关系 rand()和srand()要一起使用，其中srand()用来初始化随机数种子,rand()用来产生随机数。 因为默认情况下随机数种子为1，而相同的随机数种子产生的随机数是一样的,失去了随机 性的意义，所以为使每次得到的随机数不一样，用函数srand()初始化随机数种子。srand()的 参数，用time函数值（即当前时间），因为两次调用rand()函数的时间通常是不同的，这样 就可以保证随机性了。 四、产生一定范围随机数的通用表示公式 要取得\[a,b)的随机整数，使用(rand() % (b-a))+ a （结果值含a不含b）。 要取得\[a,b\]的随机整数，使用(rand() % (b-a+1))+ a （结果值含a和b）。 要取得(a,b\]的随机整数，使用(rand() % (b-a))+ a + 1 （结果值不含a含b）。 （总的来说，通用公式：a + rand() % n ；其中的a是起始值，n是整数的范围） 要取得a到b之间的随机整数，另一种表示：a + (int)b \* rand() / (RAND\_MAX + 1)。 要取得0～1之间的浮点数，可以使用rand() / double(RAND\_MAX)。 五、产生相同的随机数的原因 计算机的随机数都是由伪随机数，即是由小M多项式序列生成的，其中产生每个小序列都有一个初 始值，即随机种子。（注意： 小M多项式序列的周期是65535，即每次利用一个随机种子生成的随 机数的周期是65535，当你取得65535个随机数后它们又重复出现了。） 我们知道rand()函数可以用来产生随机数，但是这不是真真意义上的随机数，是一个伪随机数，是 根据一个数（我们可以称它为种子）为基准以某个递推公式推算出来的一系列数，当这系列数很大 的时候，就符合正态公布，从而相当于产生了随机数，但这不是真正的随机数，当计算机正常开机 后，这个种子的值是定了的，除非你破坏了系统。 程序示例： <table style="margin-left: 0px; font-size: 13px; border: none !important; margin-top: 0px !important; margin-right: 0px !important; margin-bottom: 0px !important; padding: 0px !important; border-collapse: collapse !important; border-spacing: 0px !important; width: auto !important; table-layout: auto !important; background: none !important;"> <tbody style="border: 0px; margin: 0px; padding: 0px;"> <tr style="border: none !important; margin: 0px !important; padding: 0px !important; vertical-align: top !important; background: none;"> <td style="font-size: 13px; text-align: center; border: none !important; margin: 0px !important; padding: 0px !important; vertical-align: top !important; font-family: Monaco, MonacoRegular, 'Courier New', monospace !important; background-image: none; background-attachment: initial; background-color: rgb(238, 238, 238) !important; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <div style="border: none; 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text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 10 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 11 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 12 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 13 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 14 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 15 </div> </div></td> <td style="font-size: 13px; text-align: center; width: 581px; border: none !important; margin: 0px !important; padding: 0px !important; vertical-align: top !important; font-family: Monaco, MonacoRegular, 'Courier New', monospace !important; background: none;"> <div style="margin: 0px; padding-right: 0px; padding-left: 0px; text-align: left; white-space: pre; overflow: visible; tab-size: 4; border: none !important; padding-top: 5px !important; padding-bottom: 3px !important; line-height: 15px !important; background: none !important;"> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(184, 92, 0) !important;">#include <iostream> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: teal !important;">using </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: bold !important; color: rgb(128, 0, 128) !important;">namespace</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 45, 122) !important;">std</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">;</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(184, 92, 0) !important;">#include <stdlib.h> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(184, 92, 0) !important;">#include <time.h> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: bold !important; color: rgb(128, 0, 128) !important;">int</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: teal !important;">main</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">(</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">)</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">{ </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: bold !important; color: rgb(128, 0, 128) !important;">int</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 45, 122) !important;">i</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">;</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: bold !important;">for</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">(</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 45, 122) !important;">i</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;">=</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 153, 153) !important;">0</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">;</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 45, 122) !important;">i</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"><</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 153, 153) !important;">10</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">;</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 45, 122) !important;">i</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;">++</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">)</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(153, 153, 153) !important; font-style: italic !important;">//产生10个随机数 </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">{ </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 45, 122) !important;">cout</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"><<</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: teal !important;">rand</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">(</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">)</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"><<</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(221, 17, 68) !important;">"/t"</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">;</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">}</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 45, 122) !important;">cout</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"><<</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 45, 122) !important;">endl</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">;</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: bold !important;">return</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 153, 153) !important;">0</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">;</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">}</span> </div> </div></td> </tr> </tbody> </table> 每次运行得到相同的随机序列： <table style="margin-left:0px; font-size:13px; border:none!important; margin-top:0px!important; margin-right:0px!important; margin-bottom:0px!important; padding:0px!important; border-collapse:collapse!important; border-spacing:0px!important; width:auto!important; table-layout:auto!important; background:none!important"> <tbody style="border:0px; margin:0px; padding:0px"> <tr style="border:none!important; margin:0px!important; padding:0px!important; vertical-align:top!important; background:none"> <td style="font-size:13px; text-align:center; border:none!important; margin:0px!important; padding:0px!important; vertical-align:top!important; font-family:Monaco,MonacoRegular,'Courier New',monospace!important; background-color:rgb(238,238,238)!important"> <div style="border:none; margin:0px; padding-right:0px; padding-left:0px; text-align:left; white-space:nowrap; padding-top:5px!important; padding-bottom:3px!important; line-height:15px!important; background:none"> <div style="border-right-width:1px!important; border-top-style:none; border-right-style:solid!important; border-bottom-style:none; border-left-style:none; border-right-color:rgb(222,222,222)!important; margin:0px; padding:0px 5px; font-size:inherit!important; font-family:inherit; text-align:right!important; height:inherit; line-height:inherit!important; font-weight:inherit!important; min-width:1.2em!important; color:rgb(170,170,170)!important; background:none"> 1 </div> <div style="border-right-width:1px!important; border-top-style:none; border-right-style:solid!important; border-bottom-style:none; border-left-style:none; border-right-color:rgb(222,222,222)!important; margin:0px; padding:0px 5px; font-size:inherit!important; font-family:inherit; text-align:right!important; height:inherit; line-height:inherit!important; font-weight:inherit!important; min-width:1.2em!important; color:rgb(170,170,170)!important; background:none"> 2 </div> </div> </td> <td style="font-size:13px; text-align:center; width:581px; border:none!important; margin:0px!important; padding:0px!important; vertical-align:top!important; font-family:Monaco,MonacoRegular,'Courier New',monospace!important; background:none"> <div style="margin:0px; padding-right:0px; padding-left:0px; text-align:left; white-space:pre; overflow:visible; border:none!important; padding-top:5px!important; padding-bottom:3px!important; line-height:15px!important; background:none!important"> <div style="border:none; margin:0px; padding:0px 5px; font-family:inherit; height:inherit; font-size:inherit!important; line-height:inherit!important; font-weight:inherit!important; background:none"> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">41</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">18467</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">6334</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">26500</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">19169</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">15724</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">11478</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> </div> <div style="border:none; margin:0px; padding:0px 5px; font-family:inherit; height:inherit; font-size:inherit!important; line-height:inherit!important; font-weight:inherit!important; background:none"> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">41</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">18467</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">6334</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">26500</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">19169</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">15724</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">11478</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">29358</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">26962</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">24464</span> </div> </div> </td> </tr> </tbody> </table> 为得到不同的随机数序列，则需改变这个种子的值。方法：在开始产生随机数前，调用一 次srand(time(NULL)) （注意：srand()一定要放在循环外面或者是循环调用的外面，否则的话得到的是相同的随机数）。 程序示例： <table style="margin-left: 0px; font-size: 13px; border: none !important; margin-top: 0px !important; margin-right: 0px !important; margin-bottom: 0px !important; padding: 0px !important; border-collapse: collapse !important; border-spacing: 0px !important; width: auto !important; table-layout: auto !important; background: none !important;"> <tbody style="border: 0px; margin: 0px; padding: 0px;"> <tr style="border: none !important; margin: 0px !important; padding: 0px !important; vertical-align: top !important; background: none;"> <td style="font-size: 13px; text-align: center; border: none !important; margin: 0px !important; padding: 0px !important; vertical-align: top !important; font-family: Monaco, MonacoRegular, 'Courier New', monospace !important; background-image: none; background-attachment: initial; background-color: rgb(238, 238, 238) !important; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"> <div style="border: none; margin: 0px; padding-right: 0px; padding-left: 0px; text-align: left; white-space: nowrap; padding-top: 5px !important; padding-bottom: 3px !important; line-height: 15px !important; background: none;"> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 1 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 2 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 3 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 4 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 5 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 6 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 7 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 8 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 9 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 10 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 11 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 12 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 13 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 14 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 15 </div> <div style="border-right-width: 1px !important; border-top-style: none; border-right-style: solid !important; border-bottom-style: none; border-left-style: none; border-right-color: rgb(222, 222, 222) !important; margin: 0px; padding: 0px 5px; font-size: inherit !important; font-family: inherit; text-align: right !important; height: inherit; line-height: inherit !important; font-weight: inherit !important; min-width: 1.2em !important; color: rgb(170, 170, 170) !important; background: none;"> 16 </div> </div></td> <td style="font-size: 13px; text-align: center; width: 581px; border: none !important; margin: 0px !important; padding: 0px !important; vertical-align: top !important; font-family: Monaco, MonacoRegular, 'Courier New', monospace !important; background: none;"> <div style="margin: 0px; padding-right: 0px; padding-left: 0px; text-align: left; white-space: pre; overflow: visible; tab-size: 4; border: none !important; padding-top: 5px !important; padding-bottom: 3px !important; line-height: 15px !important; background: none !important;"> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(184, 92, 0) !important;">#include <iostream> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: teal !important;">using </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: bold !important; color: rgb(128, 0, 128) !important;">namespace</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 45, 122) !important;">std</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">;</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(184, 92, 0) !important;">#include <stdlib.h> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(184, 92, 0) !important;">#include <time.h> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: bold !important; color: rgb(128, 0, 128) !important;">int</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: teal !important;">main</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">(</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">)</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">{ </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: bold !important; color: rgb(128, 0, 128) !important;">int</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 45, 122) !important;">i</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">;</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: teal !important;">srand</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">(</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">(</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: bold !important; color: rgb(128, 0, 128) !important;">unsigned</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">)</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: teal !important;">time</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">(</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: bold !important; color: rgb(128, 0, 128) !important;">NULL</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">)</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">)</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">;</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(153, 153, 153) !important; font-style: italic !important;">//初始化随机数种子 </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: bold !important;">for</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">(</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 45, 122) !important;">i</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;">=</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 153, 153) !important;">0</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">;</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 45, 122) !important;">i</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"><</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 153, 153) !important;">10</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">;</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 45, 122) !important;">i</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;">++</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">)</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(153, 153, 153) !important; font-style: italic !important;">//产生10个随机数 </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">{ </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 45, 122) !important;">cout</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"><<</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: teal !important;">rand</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">(</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">)</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"><<</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(221, 17, 68) !important;">"/t"</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">;</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">}</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 45, 122) !important;">cout</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"><<</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 45, 122) !important;">endl</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">;</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: bold !important;">return</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 153, 153) !important;">0</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">;</span> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(0, 111, 224) !important;"> </span> </div> <div style="border: none; margin: 0px; padding: 0px 5px; font-family: inherit; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; background: none;"> <span style="border: 0px; margin: 0px; padding: 0px; font-size: inherit !important; font-family: inherit; height: inherit; line-height: inherit !important; font-weight: inherit !important; color: rgb(51, 51, 51) !important;">}</span> </div> </div></td> </tr> </tbody> </table> 每次运行得到不同的随机序列： <table style="margin-left:0px; font-size:13px; border:none!important; margin-top:0px!important; margin-right:0px!important; margin-bottom:0px!important; padding:0px!important; border-collapse:collapse!important; border-spacing:0px!important; width:auto!important; table-layout:auto!important; background:none!important"> <tbody style="border:0px; margin:0px; padding:0px"> <tr style="border:none!important; margin:0px!important; padding:0px!important; vertical-align:top!important; background:none"> <td style="font-size:13px; text-align:center; border:none!important; margin:0px!important; padding:0px!important; vertical-align:top!important; font-family:Monaco,MonacoRegular,'Courier New',monospace!important; background-color:rgb(238,238,238)!important"> <div style="border:none; margin:0px; padding-right:0px; padding-left:0px; text-align:left; white-space:nowrap; padding-top:5px!important; padding-bottom:3px!important; line-height:15px!important; background:none"> <div style="border-right-width:1px!important; border-top-style:none; border-right-style:solid!important; border-bottom-style:none; border-left-style:none; border-right-color:rgb(222,222,222)!important; margin:0px; padding:0px 5px; font-size:inherit!important; font-family:inherit; text-align:right!important; height:inherit; line-height:inherit!important; font-weight:inherit!important; min-width:1.2em!important; color:rgb(170,170,170)!important; background:none"> 1 </div> <div style="border-right-width:1px!important; border-top-style:none; border-right-style:solid!important; border-bottom-style:none; border-left-style:none; border-right-color:rgb(222,222,222)!important; margin:0px; padding:0px 5px; font-size:inherit!important; font-family:inherit; text-align:right!important; height:inherit; line-height:inherit!important; font-weight:inherit!important; min-width:1.2em!important; color:rgb(170,170,170)!important; background:none"> 2 </div> </div> </td> <td style="font-size:13px; text-align:center; width:581px; border:none!important; margin:0px!important; padding:0px!important; vertical-align:top!important; font-family:Monaco,MonacoRegular,'Courier New',monospace!important; background:none"> <div style="margin:0px; padding-right:0px; padding-left:0px; text-align:left; white-space:pre; overflow:visible; border:none!important; padding-top:5px!important; padding-bottom:3px!important; line-height:15px!important; background:none!important"> <div style="border:none; margin:0px; padding:0px 5px; font-family:inherit; height:inherit; font-size:inherit!important; line-height:inherit!important; font-weight:inherit!important; background:none"> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">1294</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">18562</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">14141</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">18165</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">11910</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">29784</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">11070</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">13225</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">131</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">24405</span> </div> <div style="border:none; margin:0px; padding:0px 5px; font-family:inherit; height:inherit; font-size:inherit!important; line-height:inherit!important; font-weight:inherit!important; background:none"> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">1774</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">25714</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">18734</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">16528</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">20825</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">17189</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">9848</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">8899</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">2503</span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,111,224)!important"> </span> <span style="border:0px; margin:0px; padding:0px; font-size:inherit!important; font-family:inherit; height:inherit; line-height:inherit!important; font-weight:inherit!important; color:rgb(0,153,153)!important">5375</span> </div> </div> </td> </tr> </tbody> </table>
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