91学习

#include <stdio.h>

void swap(int *a,int *b){

int tmp;

tmp=*a;

*a=*b;

*b=tmp;

}

void main(){

int x,y;

int *p_x,*p_y;

printf("请输入两个数:\n");

scanf("%d",&x);

scanf("%d",&y);

p_x=&x;

p_y=&y;

swap(p_x,p_y);

printf("x=%d\n",x);

printf("y=%d\n",y);

}