#include <stdio.h>
int main()
{
void swap(int * p1, int * p2);
int a, b;
int * pointer_1, * pointer_2;
printf("please enter a and b:");
scanf("%d, %d",&a,&b);
pointer_1=&a;
pointer_2=&b;
if(a<b)
swap(pointer_1, pointer_2);
printf("max=%d,min=%d\n",a, b);
return 0;
}
void swap(int * p1, int * p2)
{
int temp;
temp=*p1;
*p1=*p2;
*p2=temp;
}
为什么交换之后输出是31呢?