가위 바위 보 (Rock Paper Scissors)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace STUDY.R_P_S
{
    class Player_User
    {
        private int user_num;

        public int user_num_gs
        {
            get
            {
                return user_num;
            }

            set
            {
                user_num = value;
            }
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace STUDY.R_P_S
{
    class Computer
    {
        private int com_num;

        public int com_num_gs
        {
            get
            {
                Random r = new Random();
                com_num = r.Next(1, 4);
                return com_num;
            }
            set
            {
                com_num = value;
            }
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace STUDY.R_P_S
{
    class Game
    {
        private int input_num;

        public int input_num_gs
        {
            get
            {
                return input_num;
            }

            set
            {
                input_num = value;
            }
        }

        public void menu()
        {

            Console.WriteLine("·Rock Paper Scissors Game!");
            while (true)
            {
                Console.WriteLine("·Rock     [1]");
                Console.WriteLine("·Paper    [2] ");
                Console.WriteLine("·Scissors [3]");
                Console.WriteLine("·E X I T  [0]");
                Console.WriteLine("");

                do
                {
                    Console.Write("·Selection Number --> ");
                    try
                    {
                        input_num = Int32.Parse(Console.ReadLine());

                        if (input_num == 0)
                        {
                            Console.WriteLine("Let's end the game");
                            Console.WriteLine("Thank you.");
                            Environment.Exit(0);
                        }
                        else if (input_num > 3 || input_num < 0)
                        {
                            Console.WriteLine("--> Error! Unlisted selection!");
                            Console.WriteLine("");
                        }
                    }
                    catch (Exception e)
                    {
                        Console.WriteLine("--> Error! You have entered something other than a number!");
                        Console.WriteLine("");
                    }
                } while (input_num > 3 || input_num < 0);

                int user_num;
                String user_str = "";

                int com_num;
                String com_str = "";

                String result = "";

                Player_User pu = new Player_User();
                pu.user_num_gs = input_num;
                user_num = pu.user_num_gs;

                Computer com = new Computer();
                com_num = com.com_num_gs;

                //User
                if (user_num == 1)
                {
                    user_str = "Rock";
                }
                else if (user_num == 2)
                {
                    user_str = "Paper";
                }
                else
                {
                    user_str = "Scissors";
                }

                //Computer
                if (com_num == 1)
                {
                    com_str = "Rock";
                }
                else if (com_num == 2)
                {
                    com_str = "Paper";
                }
                else
                {
                    com_str = "Scissors";
                }

                //Result
                switch (user_num - com_num)
                {
                    case -2:
                        result = "WIN";
                        break;

                    case -1:
                        result = "LOSE";
                        break;

                    case 0:
                        result = "DRAW";
                        break;

                    case 1:
                        result = "WIN";
                        break;

                    case 2:
                        result = "LOSE";
                        break;
                }

                Console.WriteLine("");
                Console.WriteLine("[ User : " + user_str + "] " + " VS " + " [ Computer : " + com_str + " ]");
                Console.WriteLine("--> Result : " + result);
                Console.WriteLine("");

            }
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace STUDY.R_P_S
{
    class Program
    {
        static void Main(string[] args)
        {
            Game rps = new Game();
            rps.menu();
        }
    }
}