#include <stdio.h>

#define MAX 3

typedef int (*alarm) (int type);

alarm alarm_list[MAX];

int index = 0;

void register_alarm(alarm a);

int hit_alarm(int index);

void register_alarm(alarm a)

{

    alarm_list[index++] = a;

}

int hit_alarm(int index)

{

    if (index < 0 || index >= MAX)

        return 1;

    (*alarm_list[index]) (index);

    return 0;

}

int alarm1(int type)

{

    printf("one:%d\n", type);

    return 0;

}

int alarm2(int type)

{

    printf("two:%d\n", type);

    return 0;

}

int alarm3(int type)

{

    printf("three:%d\n", type);

    return 0;

}

int main

{

    register_alarm(alarm1);

    register_alarm(alarm2);

    register_alarm(alarm3);

    hit_alarm(0);

    hit_alarm(1);

    hit_alarm(2);

    return 0;

}

#include<stdio.h>

typedef int (*__callback__) (void* type_param);

void func_register(__callback__ func, void* param);

void func_register(__callback__ func, void* param)

{

    (*func) (param);

}

// 自定义函数

int my_func(void* param)

{

    printf("Param is %d\n", (int*)param);

    return 0;

}

int main

{

    // 自定义函数通过作为函数参数进行回调

    func_register(my_func, (void*)5);

    return 0;

}