#include <iostream>

 #include<string>

 #include <vector>

 #include <algorithm>

 using namespace std;

 class Test

 {

 public:

     int val;

     int y;

     int &ref_val;

     Test():val(0x01010101),y(0x01010101),ref_val(val)

     {

     }

 };

 int main()

 {

     Test obj;

     cout << sizeof(obj)<<endl;//VS2008中，win7 32位中结果为8，说明引用也是有内存空间的

     cout << &obj<<endl;

     cout << &(obj.val)<<endl;

     cout << &(obj.y)<<endl;

     cout << &(obj.ref_val)<<endl;

     //接下来将val的引用分离，改为对y的引用

     *(&(obj.y)+)= (int)&(obj.y);

     //通过引用修改值，发现y的值变化，val不变

     obj.ref_val = 0x02020202;

     cout << hex<<obj.val <<endl<<obj.y<<endl;

     return ;

 }