An example of costumizing std::cout in C++

cout.cpp

#include <iostream>
#include <ostream>

struct Vector
{
	int x, y;
	Vector(int X, int Y) : x(X), y(Y) {}
};

std::ostream& operator<<(std::ostream& stream, const Vector& other)
{
	stream << other.x << " , " << other.y;
}

int main()
{

	Vector vector(2,3);
	std::cout << vector << std::endl;  // print -> 2 , 3

	return 0;
}