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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. class Point
  5. {
  6. public:
  7.   Point() : _x(), _y() {}
  8.   Point(int x, int y) : _x(x), _y(y) {}
  9.  
  10.   friend int& operator += (int& i, const Point& pt)
  11.   {
  12.   	i += pt._x;
  13.   	i += pt._y;
  14.   	return i;
  15.   }
  16.  
  17. private:
  18.   int _x;
  19.   int _y;
  20. };
  21.  
  22. int main()
  23. {
  24. 	int i = 5;
  25. 	Point pt(1, 2);
  26. 	i += pt;
  27. 	cout << i;
  28.     return 0;
  29. }
Success #stdin #stdout 0s 3460KB
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https://ideone.com/pvj6Mk
language:
C++ (gcc 8.3)
created:
8 years ago
visibility:
public

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