#include<stdio.h>
void swap(int *a,int *b)//定义交换函数 
{
    int num;
    num = *a;
    *a = *b;
    *b = num;
}
/**
@ALMS
*/ 
int main(void)
{
    int a=0,b=99,*p1,*p2;
    p1 = &a;
    p2 = &b;
    
    printf("%d %d\n",*p1,*p2);//输出转换前 
    swap(p1,p2);//传值交换 
    printf("%d %d\n",*p1,*p2);//输出转换后 
    
    return 0;
}