TestPoint.cs

using System;
using System.Collections.Generic;
using System.Text;

namespace PointExercise
{
    class TestPoint
    {
        public static void Main(string[] args)
        {
            Point p = new Point(43, 7);
            Point h = new Point(5, 5);

            Console.WriteLine("p=" + p);
            Console.WriteLine("h=" + h.ToString());

            double tempx = p.GetX();
            p.SetX(h.GetX());
            h.SetX(tempx);

            Console.WriteLine("p=" + p);
            Console.WriteLine("h=" + h);

            Console.WriteLine("distance=" + p.Distance(h));
            Console.WriteLine("distance=" + h.Distance(p));

            Point m = p.Middle(h); // m = h.Middle(p);
            Console.WriteLine("middle=" + m);

            // for testing only
            if (p.Distance(m) == m.Distance(h))
            {
                Console.WriteLine("OK");
            }
        }
    }
}