目录：

代码：
main.c

#include <stdio.h>
#include <stdlib.h>

int Max(int x, int y);
int Min(int x, int y);

int main(int argc, char**argv)
{
    int x,y;
    scanf("%d",&x);
    scanf("%d",&y);

    int select;
    printf("输入1表示求最小值，2表示最大值\n");
    scanf("%d",&select);
    //定义函数指针
    int (*p)(int, int);
    if(select == 1)
    {
        //最小值
        p = Min;
    }
    else if(select == 2)
    {
        //最大值
        p =Max;
    }
    else
    {
        return -1;
    }
    //查找
    printf("value is %d\n", p(x, y));
}

int Max(int x, int y)
{
    return x > y?x:y;
}
int Min(int x, int y)
{
    return x < y?x:y;
}

Makefile

main:main.c
	gcc -o $@ $^
	./$@
clean:
	rm main