using System;

public class Diem

{

        //Thanh phan du lieu

        private int x;

        private int y;

        //Thanh phan xu ly

        public Diem()

        {

            this.x = 0;

            this.y = 0;

        }

        public Diem(int a, int b)

        {

            this.x = a;

            this.y = b;

        }

        public int Truc_x

        {

            get

            {

                return this.x;

            }

            set

            {

                this.x = value;

            }

        }

        public int Truc_y

        {

            get

            {

                return this.y;

            }

            set

            {

                this.y = value;

            }

        }

    public static void Main()

    {

            Diem l = new Diem();

            Console.WriteLine(l.XuatDiem());

            Diem f = new Diem(1, 7);

            Console.WriteLine(f.XuatDiem());

            int x = f.Truc_x;

            int y = f.Truc_y;

            l.Truc_x = 0;

            l.Truc_y = 7;

            Console.WriteLine($"({x},{y})");

            Console.WriteLine(l.XuatDiem());

    }

}