Class Vector

public class Vector {
    private double x;
    private double y;

    public Vector(double x, double y) {
        this.x = x;
        this.y = y;
    }

    @Override
    public String toString() {
        return "[" + x + "; " + y + "]";
    }

    public void scale(double num) {
        this.x *= num;
        this.y *= num;
    }

    public void add(Vector other) {
        this.x += other.x;
        this.y += other.y;
    }

    public double magnitude() {
        double mag = Math.sqrt(this.x * this.x + this.y * this.y);
        return mag;
    }
}