using System;

class Point

{

    private double x, y;

    public double X

    {

        set { this.x = value; }

        get { return this.x; }

    }

    public double Y

    {

        set { this.y = value; }

        get { return this.y; }

    }

    public Point(double x, double y)

    {

        this.x = x;

        this.y = y;

    }

    public Point(Point M)

    {

        this.x = M.x;

        this.y = M.y;

    }

    public double DistTo(Point M)

    {

        double d;

        d = Math.Sqrt(Math.Pow(this.x - M.x, 2) + Math.Pow(this.y - M.y, 2));

        return d;

    }

    public bool TF(Point M)

    {

        return this.x == M.x && this.y == M.y;

    }

        public double N(Point M)

        {

            double n = (this.x + M.x) / 2;

            return n;

​

        }

         public double P(Point M)

        {

            double t = (this.y + M.y) / 2;

            return t;

        }

​

}

​

namespace T.M

{

    class Program

    {

        static void Main(string[] args)

        {

            double x1, y1, x2, y2;

            Console.WriteLine("Въведете координатите на А: ");

            x1 = double.Parse(Console.ReadLine());

            y1 = double.Parse(Console.ReadLine());

            Point A = new Point(x1, y1);

            Console.WriteLine("Въведете координатите на В: ");

            x2 = double.Parse(Console.ReadLine());

            y2 = double.Parse(Console.ReadLine());

            Point B = new Point(x2, y2);

            Point C = new Point(A);

            Console.WriteLine("Разстоянието между А и В е " + C.DistTo(B));

            Console.WriteLine(A.TF(B));

            Console.WriteLine("М (" + A.N(B) + ";" +A.P(B) + ")");

        }

    }

}