#include<iostream>
#include<cmath>

class vector2d {
	double x, y;
public:
	vector2d() : x(0), y(0) {}
	vector2d(double ix, double iy) : x(ix), y(iy) {}

	double magnitude() const { // this is a pointer to the instance this was called on
		return sqrt(x*x + y*y);
	}

	vector2d operator+(const vector2d& other) const {
		vector2d result(x + other.x, y + other.y);
		return result;
	}
	vector2d operator-(const vector2d& other) const {
		vector2d result(x - other.x, y - other.y);
		return result;
	}
	double dot(const vector2d& other) const {
		return x * other.x + y * other.y;
	}

	~vector2d(){
		std::cout << "Destructor Called\n";
	}
	friend std::string to_string(const vector2d&);
};

std::string to_string(const vector2d& to_convert) {
	return std::to_string(to_convert.x) + ", " + std::to_string(to_convert.y);
}

std::ostream& operator<<(std::ostream& out, const vector2d& to_print){
	out << to_string(to_print);
	return out;
}


using namespace std;

int main(){
	vector2d a(4.2, 5.6);
	vector2d b(3.1, -26.2);
	cout << "Size of a:  " << sizeof(a) << endl;

//	a.x = 7.4;
	cout << a.magnitude() << endl;
//	cout << a.x << endl;

	vector2d c;
	// a.add(b)
	c = a + b;


	// Goal for the end
	cout << a + b << endl;
	cout << "a dot b = " << a.dot(b) << endl;
}