c语言之指向函数的指针

#include<stdio.h>
#include<iostream>
int max(int, int);
int main() {
    int (*p)(int,int);
    int a, b, c;
    p = max;
    printf("请输入a,b的值，以空格隔开：\n");
    scanf_s("%d %d", &a, &b);
    c = (*p)(a, b);
    printf("a=%d,b=%d,max=%d\n", a, b, c);
    system("pause");
    return 0;
}
int max(int a, int b) {
    if (a >= b) {
        return a;
    }
    else
    {
        return b;
    }
}

#include<stdio.h>
#include<iostream>
int max(int, int);
int min(int, int);
int add(int, int);
int process(int a, int b, int(*func)(int a, int b));
int main() {
    int a, b;
    printf("请输入a,b的值，以空格隔开：\n");
    scanf_s("%d %d", &a, &b);
    printf("a=%d,b=%d,max=%d\n", a, b, process(a,b,max));
    printf("a=%d,b=%d,min=%d\n", a, b, process(a, b, min));
    printf("a=%d,b=%d,add=%d\n", a, b, process(a, b, add));
    system("pause");
    return 0;
}
int max(int a, int b) {
    if (a >= b) {
        return a;
    }
    else
    {
        return b;
    }
}
int min(int a, int b) {
    if (a >= b) {
        return b;
    }
    else
    {
        return a;
    }
}
int add(int a, int b) {
    return a + b;
}
int process(int a, int b, int(*func)(int a,int b)) {
    return (*func)(a, b);
}