回调函数的经典代码使用

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#include "stdio.h"
#include "stdlib.h"

int add(int a,int b)
{
return a+b;
}

int sub(int a,int b)
{
return a-b;
}

typedef int (*fcb_fun)(int a,int b);

typedef struct mydata
{
int a,b;
fcb_fun fcb;
}mydata_t;

mydata_t *mydata_create(fcb_fun out_fcb)
{
mydata_t *data = (mydata_t *)malloc(sizeof(mydata_t));
data->fcb = out_fcb;
data->a = 0;
data->b = 0;

return data;
}

void mydata_release(mydata_t *data)
{
free(data);
}

void mydata_operate(mydata *data)
{
int c =data->fcb(data->a,data->b);
printf("mydata inner operate %d \n",c);
}

int main(void)
{
mydata_t *data =mydata_create(add);
data->a =10;
data->b =3;
mydata_operate(data);

data->fcb = sub;
mydata_operate(data);
mydata_release(data);

return 0;
}

 使用机制

回调函数的经典代码使用

标签：原型   eof   rate   参数   tar   lease   类型   做了   定时   

原文地址：https://www.cnblogs.com/zhangbing12304/p/8747588.html