#include <iostream>

using namespace std;

class Vector3 {
public:
	Vector3(double, double, double);

	double getX() { return x; }
	double getY() { return y; }
	double getZ() { return z; }
private:
	double x, y, z;
};

Vector3::Vector3(double x0, double y0, double z0) {
	x = x0;
	y = y0;
	z = z0;
}

ostream & operator<<(ostream &os, Vector3 vec) {
	return os << "<" << vec.getX() << ", " << vec.getY() << ", " << vec.getZ() << ">";
}

int main() {
	Vector3 myFirstVector(1, -2, 3);
	cout << "myFirstVector = " << myFirstVector << endl;
	return 0;
}