text: #include <iostream>
  
  int main()
  {
      int a = 12;
      int &ra = a;   // ra is another name for a
      --ra;          // a == 11
      a = 10;        // ra == 10
      int* ip = &ra; // ip points to a  
  
      std::cout << &ra << " " << &a << std::endl;
       
      return 0;
  }