using System;

​

public class Program

{

    public static void Main()

    {

        while(true)

            RockPaperScissorsGame ();

    }

​

    public static string GetChoice(bool flag)

    {

        Random rng = new Random();

        if (flag == false)

        {

            int AI = rng.Next(3);

            if (AI == 0)

            {

                return "r";

            }

            else if (AI == 1)

            {

                return "p";

            }

            else

            {

                return "s";

            }

        }

        else

        {

            string input;

            do{

                Console.Write ("Enter r, s or p: ");

                input = Console.ReadLine().ToLower();

            }while(input != "r" && input != "s" && input != "p");

            return input;

        }

    }

    public static int RoundState (string PlayerOne, string PlayerTwo){

        if(PlayerOne == "r" && PlayerTwo == "s" || PlayerOne == "s" && PlayerTwo == "p" 

           || PlayerOne == "p" && PlayerTwo == "r"){

            return 1;

        }

        else if(PlayerOne == "r" && PlayerTwo == "p" || PlayerOne == "s" && PlayerTwo == "r" 

           || PlayerOne == "p" && PlayerTwo == "s"){

            return 2;

        }

        return 0;

    }

    public static void RockPaperScissorsGame (){

        Console.WriteLine("----Rock, Paper, Scissors Game----");

        string playerOneChoice = GetChoice (false);

        string playerTwoChoice = GetChoice (true);

        string temp = "";

        switch (playerOneChoice){

            case "r":

            temp = "Rock";

            break;

            case "p":

            temp = "Paper";

            break;

            case "s":

            temp = "Scissors";

            break;

        }

        string temp2 = "";

        switch (playerTwoChoice){

            case "r":

            temp2 = "Rock";

            break;

            case "p":

            temp2 = "Paper";

            break;

            case "s":

            temp2 = "Scissors";

            break;

        }

        Console.WriteLine (temp + " vs " + temp2);

        int win = RoundState (playerOneChoice, playerTwoChoice);

        if (win == 1){

            Console.WriteLine ("Player 1 has won!");                

        }

        else if (win == 2){

            Console.WriteLine ("Player 2 has won!");                

        }

        else{

            Console.WriteLine ("Game was a draw!");             

        }

    }

}