[此贴子已经被作者于2017-4-17 07:21编辑过]

程序代码：

#include<stdio.h>
#include<stdlib.h> 
#include<string.h>
#define ERROR 0
#define OK 1


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

int main() {
    int (*fun)(int,int);
    fun=add;
    printf("%d\n",fun(5,6));
    fun=multiply;
    fun(5,6);
    printf("%d\n",fun(5,6));
    return 0;
}