c语言回调函数+视频,C语言回调函数实例
#include#definenull((void*)0)
//定义一个学生结构体
typedef struct
{
char *Name;
long Number;
unsigned char ChinesSocre;
unsigned char MathSocre;
unsigned char EnglishSocre;
long sumSocre;
float averageSocre;
} STU,*PSTU;
//定义回调函数指针
typedef int (*SearchFunCallBack)(void const *, void const *);
//查找学生并计算总成绩和平均成绩。
PSTU SearchStudents(PSTU pStuList,SearchFunCallBack searchFun,void const * searchValue)
{
while(pStuList->Name != null)
{
if(searchFun(pStuList,searchValue) == 1)
{
pStuList->sumSocre=pStuList->ChinesSocre+pStuList->MathSocre+pStuList->EnglishSocre;
pStuList->averageSocre=pStuList->sumSocre/3.0f;
break;
}
pStuList++;
}
return pStuList;
}
//通过学号查找学生
int SearchByNumber(void const * ListNode,void const * value)
{
PSTU pStu;
pStu = (PSTU)ListNode;
if(pStu->Number == *(long *)value)
{
return 1;
}
else
{
return 0;
}
}
//通过姓名查找学生
int SearchByName(void const * ListNode,void const * value)
{
PSTU pStu;
pStu = (PSTU)ListNode;
if(pStu->Name == (char *)value)
{
return 1;
}
else
{
return 0;
}
}
void main()
{
PSTU pStu;
STU students[3];
students[0].Name=”小张”;
students[0].Number=1001;
students[0].ChinesSocre=78;
students[0].MathSocre=86;
students[0].EnglishSocre=85;
students[1].Name=”小明”;
students[1].Number=1002;
students[1].ChinesSocre=96;
students[1].MathSocre=67;
students[1].EnglishSocre=90;
students[2].Name=”小李”;
students[2].Number=1003;
students[2].ChinesSocre=87;
students[2].MathSocre=75;
students[2].EnglishSocre=95;
while(1)
{
long value = 1003;
//pStu = SearchStudents(students,SearchByNumber,&value);// 通过学号查找
pStu = SearchStudents(students,SearchByName,”小明”);// 通过姓名查找
if(pStu->Name == null)
{
printf(“没有找到该学生。\n”);
}
else
{
printf(“查找到相应的学生：\n姓 名：%s\n学 号：%d\n语文成绩：%d\n数学成绩：%d\n英语成绩：%d\n总 成 绩：%d\n平均成绩：%.2f”
,pStu->Name,pStu->Number,pStu->ChinesSocre,pStu->MathSocre,pStu->EnglishSocre,pStu->sumSocre,pStu->averageSocre);
}
while(1);
}
}
矫情吗；*
小鱼儿
超、凢脫俗
骑猪看日落
今天药忘吃喽~
不念不忘少年蓝@
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