输入两个整数，然后让用户选择1或者2，选1是调用max函数，输出二者中大数，选2时调用min函数输出二者中的小数(指向函数的指针变量)

#include<stdio.h>int main (){int max(int,int);int min(int x,int y);int (*p)(int,int);int a;int b;int c;int n;printf("enter a and b:");scanf("%d,%d",&a,&b);printf("choose 1 or 2:");scanf("%d",&n);if(n == 1){p = max;}else if(n == 2){p = min;}c = (*p)(a,b);printf("a = %d,b = %d\n",a,b);if(n == 1){printf("max = %d\n",c);}else{printf("min = %d\n",c);}return 0;}int max(int x,int y){int z;if(x > y){z = x;}else{z = y;}return z;}int min(int x,int y){int z;if(x < y){z = x;}else{z = y;}return z;}