回 调

话不多说，上代码

#include<iostream>
using namespace std;

typedef int(*ABCD)(char* p);//这里的ABCD可以用任意字符串替换，不过一般用类似CallBack的字符串

int fun(char* p)
{
    cout << "call back output:" << p << endl;
    return 10;
}

void fun1(ABCD callBack,char* p)
{
    cout << "call back return:" << callBack(p) << endl;
}

int main()
{
    ABCD callBack = fun;
    fun1(callBack,"a");
}



call back output:a
call back return:10