public class UseSimplePoint {
    public static void main(String[] args) {
        SimplePoint p = new SimplePoint();
        System.out.println("p x: " + p.x + ", y: " + p.y);

        p.x = 2;
        p.y = 3;
        System.out.println("p x: " + p.x + ", y: " + p.y);

        SimplePoint origin = new SimplePoint();
        System.out.println("origin x: " + p.x + ", y: " + p.y);

        System.out.println(distance(p, origin));
    }
    
    // Given two SimplePoints: p1, p2
    // returns the calculated distance between these two points
    public static double distance(SimplePoint p1, SimplePoint p2) {
        int deltaX = p2.x - p1.x;
        int deltaY = p2.y - p1.y;

        return Math.sqrt(deltaX * deltaX + deltaY * deltaY);
    }
}