C++ Tutorial/Operator Overloading/overload comma operator

overload comma for Point

<source lang="cpp">#include <iostream> using namespace std; class Point {

 int x, y;

public:

 Point() {}
 Point(int px, int py) {
   x = px;
   y = py;
 }
 void show() {
   cout << x << " ";
   cout << y << "\n";
 }
 Point operator+(Point op2);
 Point operator,(Point op2);

}; // overload comma for Point Point Point::operator,(Point op2) {

 Point temp;
 temp.x = op2.x;
 temp.y = op2.y;
 cout << op2.x << " " << op2.y << "\n";
 return temp;

} // Overload + for Point Point Point::operator+(Point op2) {

 Point temp;
 temp.x = op2.x + x;
 temp.y = op2.y + y;
 return temp;

} int main() {

 Point ob1(10, 20), ob2( 5, 30), ob3(1, 1);
 ob1.show();
 ob2.show();
 ob3.show();
 cout << "\n";
 ob1 = (ob1, ob2+ob2, ob3);
 ob1.show(); // displays 1 1, the value of ob3
 return 0;

}</source>

10 20
5 30
1 1
10 60
1 1
1 1

Overloading the Comma Operator

<source lang="cpp">#include <iostream> using namespace std;

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() {

 loc ob1(10, 20), ob2( 5, 30), ob3(1, 1);
  
 ob1.show();
 ob2.show();
 ob3.show();
 cout << "\n";
  
 ob1 = (ob1, ob2+ob2, ob3);
  
 ob1.show(); // displays 1 1, the value of ob3
  
 return 0;

}</source>