指针修改变量地址

#include "stdafx.h"
#include<stdio.h>
#include<iostream>
using namespace std;

int main()
{    
    int a,b,*p1,*p2,*p3;
    a=100;
    b=200;
    
    p1=&a;
    p2=&b;
    
    //int c=a+b;
    printf("p1地址：%p\n",p1);
    printf("p2的地址：%p\n",p2);
    printf("a地址：%p\n",&a);
    printf("b地址：%p\n",&b);
    printf("a=%d\n",a);
    printf("b=%d\n",b);
    //printf("*p1=%d\n",*p1);
    //printf("*p2=%d\n",*p2);
    if(a<b)
    {
        p3=p1;
        p1=p2;
        p2=p3;
    };
    //p1,p2的地址改变， a,b,的数值不变
    printf("*p1=%d\n",*p1);
    printf("*p2=%d\n",*p2);
    printf("p1地址：%p\n",p1);
    printf("p2的地址：%p\n",p2);
    printf("a=%d\n",a);
    printf("b=%d\n",b);
    system("pause");
    return 0;
}