#include <stdio.h>
void swap(int a,int b)
{
    int t;
    printf("交换前的形参：a=%d,b=%d\n",a,b);
    t=a;a=b;b=t;
    printf("交换后的形参：a=%d,b=%d\n",a,b);
}
int main(void)
{
    int x,y;
    printf("请输入两个整数：");
    scanf("%d%d",&x,&y);
    swap(x,y);
    printf("交换后的实参：x=%d,y=%d\n",x,y);
    return 0;
}