#include <iostream> 
   
using namespace std; 
   
class test 
{ 
private: int a; 
public:  test(){a=6;} 
         int& print(){return a;} 
}; 
   
int main() 
{ 
   test one; 
   int& b = one.print(); 
   b = 8; 
   cout << one.print() << endl; 
}