struct point {
	int x, y;
};

/*
point point_add(point a, point b) {
	point c = {a.x + b.x, a.y + b.y};
	return c;
}
*/

point operator +(point a, point b) {
	point c = {a.x + b.x, a.y + b.y};
	return c;
}

#include <iostream>

int main() {
	point a = {1, 2};
	point b = {3, 4};
	point c = a + b;	
	std::cout << c.x << ", " << c.y << std::endl;
}