// Page 208-209

public class Point
{
	private int x;
	private int y;

	public Point()	// default constructor
	{
		x = 0;
		y = 0;
	}

	public Point(int px, int py)
	{
		x = px;
		y = py;
	}

	public double distance(Point p)
	{
         return(Math.sqrt((p.x-x)*(p.x-x)+(p.y-y)*(p.y-y)));
	}
}