using System;

​

public class Program

{

    public class Obdelnik

    {

        public double X;

        public double Y;

        public Obdelnik(double x, double y)

        {

            X = x;

            Y = y;

        }

​

        public void ZobrazInformace()

        {

            Console.Write("X:" + X + ", Y:" + Y);

        }

​

        public bool JeCtverec(); 

        { 

            return(X ==Y);

        }

​

    public void ZvetsiO(double oKolikZvetsit)

        {

            X = X + ZvetsiO;

            Y = Y + ZvetsiO;

        }

}   }

​

static void Main(string[] args)

{

    Obdelnik obdelnik = new Obdelnik(4, 5);

    obdelnik.ZobrazInformace();

    Console.WriteLine("Je čtverec: " + obdelnik.JeCtverec());

    obdelnik.ZvetsiO(5);

    obdelnik.ZobrazInformace();

}