C++ Program on Overloads assignment operator (=)

         #include <iostream>
   using namespace std;
   class alpha
   {
     private:
       int data;
     public:
       alpha(){ }
       alpha(int d){ data = d; }
       void display(){ cout << data; }
       alpha operator = (alpha& a)
       {
         data = a.data;
         cout << "\nAssignment operator invoked";
         return alpha(data);
       }
   };
   int main()
   {
     alpha a1(37);
     alpha a2;
     a2 = a1;
     cout << "\na2=";
     a2.display();
     alpha a3 = a2;
     cout << "\na3=";
     a3.display();
     cout << endl;
     return 0;
   }