using System;

public class Program

{

    static int computer_score = 0;

    static int player_score = 0;

    static int menuchoice;

    public static void DisplayMenu()

    {

        bool valid = false;

        Console.WriteLine("DICE GAME");

        do

        {

            Console.WriteLine("Enter 1 to play or 2 to quit");

            try

            {

                menuchoice = int.Parse(Console.ReadLine());

                if (menuchoice == 1 || menuchoice == 2)

                {

                    valid = true;

                }

                else

                {

                    Console.WriteLine("invalid input - try again");

                }

            }

            catch(Exception)

            {

                Console.WriteLine("invalid input - try again");

            }

        }

        while (valid == false);

    }

    public static void PlayGame()

    {

        Random player = new Random();

        int playernum = player.Next(1,2);

        Console.WriteLine();

        while (computer_score<30 && player_score<30)

        {

            switch(playernum)

            {

                case 1:

                    int roll = RollDice();

                    Console.WriteLine("Your roll:" + roll);

                    player_score += roll;

                    Console.WriteLine("Your score:" + player_score);

                    break;

                case 2:

                    int roll2 = RollDice();

                    Console.WriteLine("Computer roll: " + roll2);

                    computer_score += roll2;

                    Console.WriteLine("Computer score:" + computer_score);

                    break;

                default:

                    break;

            }

            playernum = playernum%2 +1;

            Console.ReadLine();

        }

            Console.WriteLine("FINAL SCORES:");

            Console.WriteLine("Your score: " + player_score);

            Console.WriteLine("Computer score: " + computer_score);

            if ((player_score > 30)&&(player_score > computer_score))

            {

                Console.WriteLine("You win!");

            }

            else if (player_score == computer_score)

            {

                Console.WriteLine("You drew!");

            }

            else

            {

                Console.WriteLine("You lose :(");

            }

    }

    public static int RollDice()

    {

        Random dice = new Random();

        return dice.Next(1,6);

    }

    public static void Main()

    {

        bool run = true;

        while (run == true)

        {

            DisplayMenu();

            if (menuchoice == 1)

            {

                PlayGame();

            }

            else

            {

                run = false;

            }

            Console.WriteLine();

        }

    }   

}