using System;

​

​

public class Program

{

    public static void Main(string[] args)

    {

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        string[] gameOptions = { "Rock", "Paper", "Scissors"};

        int playerWins = 0;

        int computerWins = 0;

        bool keepPlaying = true;

        while (keepPlaying) {       

            Console.WriteLine("Please choose an option:");

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            // Ask the user to choose an option.

            Console.WriteLine("\t1 - Rock");

            Console.WriteLine("\t2 - Paper");

            Console.WriteLine("\t3 - Scissors");

            Console.WriteLine("\t4 - Exit");    

​

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            int playerChoice;                   

            playerChoice = Convert.ToInt32(Console.ReadLine());

​

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            string computerChoice;

            var random = new Random();

            int index = random.Next(gameOptions.Length);        

            computerChoice = gameOptions[index];

​

​

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            if (playerChoice == 1) //Rock

            {

                Console.WriteLine("Player chose: Rock");

                Console.WriteLine("Computer chose: " + computerChoice);

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                if (computerChoice == "Paper"){

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                    Console.WriteLine("Player loses.");

                    computerWins = computerWins + 1;        

                }

                else if (computerChoice == "Scissors"){

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                    Console.WriteLine("Player wins.");

                    playerWins = playerWins + 1;        

                }           

                else if (computerChoice == "Rock"){

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                    Console.WriteLine("Draw.");

                }                   

            }

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            if (playerChoice == 2) //Paper

            {

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                Console.WriteLine("Player chose: Paper");

                Console.WriteLine("Computer chose: " + computerChoice);

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                if (computerChoice == "Scissors"){

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                    Console.WriteLine("Player loses.");

                    computerWins = computerWins + 1;        

                }

                else if (computerChoice == "Rock"){

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                    Console.WriteLine("Player wins.");

                    playerWins = playerWins + 1;        

                }           

                else if (computerChoice == "Paper"){

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                    Console.WriteLine("Draw.");

                }                   

            }

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            if (playerChoice == 3) //Scissors

            {

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                Console.WriteLine("Player chose: Scissors");

                Console.WriteLine("Computer chose: " + computerChoice);

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                if (computerChoice == "Rock"){

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                    Console.WriteLine("Player loses.");

                    computerWins = computerWins + 1;        

                }

                else if (computerChoice == "Paper"){

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                    Console.WriteLine("Player wins.");

                    playerWins = playerWins + 1;        

                }           

                else if (computerChoice == "Scissors"){

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                    Console.WriteLine("Draw.");

                }                   

            }

            else if (playerChoice == 4)

            {

                Exit(); 

            }       

            else if (playerChoice <1 || playerChoice >4)

            {

                Console.WriteLine("Unknown input!");    

                Exit(); 

            }

            Console.WriteLine("New game? yes/no");

            string answer = Console.ReadLine(); //wait for player to press a key

            if (answer != "yes")

            {

                keepPlaying = false;

            }

        }

        if (playerWins > computerWins)

        {

            Console.WriteLine("Player wins with: " + playerWins + "-" + computerWins);

        }

        else if (playerWins < computerWins)

        {

            Console.WriteLine("Computer wins with: " + playerWins + "-" + computerWins);

        }       

        else

        {

            Console.WriteLine("It's a draw: " + playerWins + "-" + computerWins);

        }

​

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        //keepPlaying = cki.KeyChar == 'y'; //continue only if y was pressed

    }

​

​

    static void Exit() { 

        Console.WriteLine("Exitting...");

        //Environment.Exit(0);

    }

}