lab2_proglang

 class Point
    {
        double x;
        double y;
        public double X
        {
            get { return x; }
            set
            {

                x = value;
            }

        }
        public double Y
        {
            get { return y; }
            set
            {
                y = value;
            }

        }
        public Point(double x, double y)
        {
            X = x;
            Y = y;


        }
        public Point()
        {
            X = 0;
            Y = 0;
        }

        public Point(Point a)
        {
            X = a.X;
            Y = a.Y;

        }
        public override string ToString()
        {

            return "Точка с координатами " + X.ToString() + " и " + Y.ToString();

        }

        public static Point operator --(Point a)
        {
            a.X -= 1;
            a.Y -= 1;
            return a;
        }
        public static Point operator -(Point a)
        {
            Point b = new Point(a);
            double t = b.X;
            b.X = b.Y;
            b.Y = t;
            return b;
        }
        public static implicit operator int (Point a) // неявное преобразование
        {
            return (int)a.X;
        }
        public static explicit operator double(Point a) // явное преобразование
        {
            return a.Y;
        }
        public static Point operator -(Point a, int d)
        {
            Point b = new Point(a);
            b.Y -= d;
            return b;
        }
        public static Point operator -(int d, Point a )
        {
            Point b = new Point(a);
            b.X -= d;
            return b;
        }
        public static double operator -(Point a, Point b)
        {

            return Math.Sqrt ((a.X-b.X)* (a.X - b.X) + (a.Y - b.Y)* (a.Y - b.Y));
        }

    }

using System;

namespace labLangProgram_trim4_2
{
    class Program
    {
        static void Main(string[] args)
        {
            Point p = new Point(3.1, 4.2);
            Console.WriteLine(p.ToString());
            Console.WriteLine((p--).ToString());
            Console.WriteLine((-p).ToString());
            Console.WriteLine(p.ToString());
            Console.WriteLine((double)p);
            Console.WriteLine(p+0);

            Console.WriteLine((p - 22).ToString());
            Console.WriteLine((22  - p).ToString());
            Point p2 = new Point(p);
            p2.X = 222;
            Console.WriteLine((p2 - p).ToString());
        }
    }
}