using System; public class Application{ public static void Main(){ Point2D p1 = new Point2D(1.1, 2.2), p2 = new Point2D(3.3, 4.4); Point3D q1 = new Point3D(1.1, 2.2, 3.3), q2 = new Point3D(4.4, 5.5, 6.6); p2.Move(1.0, 2.0); q2.Move(1.0, 2.0, 3.0); Console.WriteLine("{0} {1}", p1, p2); Console.WriteLine("{0} {1}", q1, q2); } }