引用

#include <iostream>
using namespace std;

int  main()
{
    int rats=101;
    int &rodents=rats;  //&为引用
    cout<<"rats="<<rats;
    cout<<",rodents"<<endl;
    rodents++;
    cout<<"rats="<<rats;
    cout<<",rodents"<<rodents<<endl;
    cout<<"rats address="<<&rats;
    cout<<",rodents address="<<&rodents<<endl;
    getchar();
    return 0;
}