C++最大值

柔情只为你懂 2023-02-21 14:07 13阅读 0赞

C++中, 经常会使用, 某些类型的最大值, 如int的最大整数(INT\_MAX), C的函数中, 包含了这些宏定义.

头文件:

#include <climits>

具体参见:

<table> 
 <thead> 
  <tr> 
   <th>name</th> 
   <th>expresses</th> 
   <th>value*</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>CHAR_BIT</td> 
   <td>Number of bits in a&nbsp;char&nbsp;object (byte)</td> 
   <td>8&nbsp;or greater*</td> 
  </tr> 
  <tr> 
   <td>SCHAR_MIN</td> 
   <td>Minimum value for an object of type&nbsp;signed char</td> 
   <td>-127&nbsp;(-27+1) or less*</td> 
  </tr> 
  <tr> 
   <td>SCHAR_MAX</td> 
   <td>Maximum value for an object of type&nbsp;signed char</td> 
   <td>127&nbsp;(27-1) or greater*</td> 
  </tr> 
  <tr> 
   <td>UCHAR_MAX</td> 
   <td>Maximum value for an object of type&nbsp;unsigned char</td> 
   <td>255&nbsp;(28-1) or greater*</td> 
  </tr> 
  <tr> 
   <td>CHAR_MIN</td> 
   <td>Minimum value for an object of type&nbsp;char</td> 
   <td>either&nbsp;SCHAR_MIN&nbsp;or&nbsp;0</td> 
  </tr> 
  <tr> 
   <td>CHAR_MAX</td> 
   <td>Maximum value for an object of type&nbsp;char</td> 
   <td>either&nbsp;SCHAR_MAX&nbsp;or&nbsp;UCHAR_MAX</td> 
  </tr> 
  <tr> 
   <td>MB_LEN_MAX</td> 
   <td>Maximum number of bytes in a multibyte character, for any locale</td> 
   <td>1&nbsp;or greater*</td> 
  </tr> 
  <tr> 
   <td>SHRT_MIN</td> 
   <td>Minimum value for an object of type&nbsp;short int</td> 
   <td>-32767&nbsp;(-215+1) or less*</td> 
  </tr> 
  <tr> 
   <td>SHRT_MAX</td> 
   <td>Maximum value for an object of type&nbsp;short int</td> 
   <td>32767&nbsp;(215-1) or greater*</td> 
  </tr> 
  <tr> 
   <td>USHRT_MAX</td> 
   <td>Maximum value for an object of type&nbsp;unsigned short int</td> 
   <td>65535&nbsp;(216-1) or greater*</td> 
  </tr> 
  <tr> 
   <td>INT_MIN Minimum</td> 
   <td>value for an object of type&nbsp;int</td> 
   <td>-32767&nbsp;(-215+1) or less*</td> 
  </tr> 
  <tr> 
   <td>INT_MAX</td> 
   <td>Maximum value for an object of type&nbsp;int</td> 
   <td>32767&nbsp;(215-1) or greater*</td> 
  </tr> 
  <tr> 
   <td>UINT_MAX</td> 
   <td>Maximum value for an object of type&nbsp;unsigned int</td> 
   <td>65535&nbsp;(216-1) or greater*</td> 
  </tr> 
  <tr> 
   <td>LONG_MIN</td> 
   <td>Minimum value for an object of type&nbsp;long int</td> 
   <td>-2147483647&nbsp;(-231+1) or less*</td> 
  </tr> 
  <tr> 
   <td>LONG_MAX</td> 
   <td>Maximum value for an object of type&nbsp;long int</td> 
   <td>2147483647&nbsp;(231-1) or greater*</td> 
  </tr> 
  <tr> 
   <td>ULONG_MAX</td> 
   <td>Maximum value for an object of type&nbsp;unsigned long int</td> 
   <td>4294967295&nbsp;(232-1) or greater*</td> 
  </tr> 
  <tr> 
   <td>LLONG_MIN</td> 
   <td>Minimum value for an object of type&nbsp;long long int</td> 
   <td>-9223372036854775807&nbsp;(-263+1) or less*</td> 
  </tr> 
  <tr> 
   <td>LLONG_MAX</td> 
   <td>Maximum value for an object of type&nbsp;long long int</td> 
   <td>9223372036854775807&nbsp;(263-1) or greater*</td> 
  </tr> 
  <tr> 
   <td>ULLONG_MAX</td> 
   <td>Maximum value for an object of type&nbsp;unsigned long long int</td> 
   <td>18446744073709551615&nbsp;(264-1) or greater*</td> 
  </tr> 
 </tbody> 
</table>

参考链接：[https://blog.csdn.net/caroline\_wendy/article/details/24311895][https_blog.csdn.net_caroline_wendy_article_details_24311895]

[https_blog.csdn.net_caroline_wendy_article_details_24311895]: https://blog.csdn.net/caroline_wendy/article/details/24311895