/*
指针 (更换地址保存的地址)
2017-1-11 16:59:24 

*/


# include <iostream>
using namespace std;
int main()
{
    int i=10,j=20;
    int *p=&i;//"p"是一个地址；"*p"是一个值 
    cout<<i<<endl;
    cout<<&i<<endl;
    cout<<j<<endl;
    cout<<&j<<endl;
    cout<<p<<endl;
    cout<<*p<<endl;
    p=&j;   //地址和值都会被代替 
    cout<<"更换地址后"<<endl;
    cout<<i<<endl;
    cout<<&i<<endl;
    cout<<j<<endl;
    cout<<&j<<endl;
    cout<<p<<endl;
    cout<<*p<<endl;
    return 0;
    
}