Comma Operator Overload in C++

#include <iostream.h>

#include <conio.h>

class loc

{

      int longitude, latitude;

      public:

      loc() {}

      loc(int lg, int lt)

      {

            longitude = lg;

            latitude = lt;

      }

      void show()

      {

            cout << longitude << " ";

            cout << latitude << "\n";

      }

      loc operator+(loc op2);

      loc operator,(loc op2);

};

// overload comma for loc

loc loc::operator,(loc op2)

{

      loc temp;

      temp.longitude = op2.longitude;

      temp.latitude = op2.latitude;

      cout << op2.longitude << " " << op2.latitude << "\n";

      return temp;

}

// Overload + for loc

loc loc::operator+(loc op2)

{

      loc temp;

      temp.longitude = op2.longitude + longitude;

      temp.latitude = op2.latitude + latitude;

      return temp;

}

int main()

{

      clrscr();

      loc ob1(10, 20), ob2( 5, 30), ob3(1, 1);

      ob1.show();

      ob2.show();

      ob3.show();

      cout << "\n";

      ob1=(ob1,ob2+ob2);

      ob1.show();

      ob1 = (ob1, ob2+ob2, ob3);

      ob1.show(); // displays 1 1, the value of ob3

      getch();

      return 0;

}