using System;

​

public class Program

{

    public static void Main()

    {

        // create and initialise variables

        int UserChoiceNumber = 0;

    //  int ComputerChoiceNumber = rand.Next(0,2); 

        int GameResultNumber = 0;

        int UserScore = 0;

        int ComputerScore = 0;

        string UserChoiceWord = "";

        string UserWantsToPlay = "Y";

        // Put in a while loop so the game repeats until the user selects "N" to stop playing.

        while (UserWantsToPlay.ToUpper() == "Y")

        {

            Console.WriteLine("Choose Scisscors [S], Paper [P], or Rock [R]");

            UserChoiceWord = Console.ReadLine();

            Console.WriteLine();

            // Console.WriteLine("User Choice is " + UserChoiceWord);

            // I used ToUpper to correct players choice from a lower case letter to an uppercase letter to successfully run the code

​

            // get users chosen choice number 

            if (UserChoiceWord.ToUpper() == "S")

            {

                UserChoiceNumber = 0;

                // Console.WriteLine("User picks Scisscors, which is value " + UserChoiceNumber);

                Console.WriteLine("User picks Scisscors");

                Console.WriteLine();

            }

            else if (UserChoiceWord.ToUpper() == "P")

            {

                UserChoiceNumber = 1;

                // Console.WriteLine("User picks Paper, which is value " + UserChoiceNumber);

                Console.WriteLine("User picks Paper");

                Console.WriteLine();

            }

            else if (UserChoiceWord.ToUpper() == "R")

            {

                UserChoiceNumber = 2;

                // Console.WriteLine("User picks Rock, which is value " + UserChoiceNumber);

                Console.WriteLine("User picks Rock");

                Console.WriteLine();

            }

            else

            {

                Console.WriteLine("Invalid choice :(");

                // trying to get user to pick again and go back to the check.

                Console.WriteLine("Please try again - type [S],[P] or [R].");

                // just exit program at the moment...

                UserWantsToPlay = "Q";

                UserChoiceNumber = 4;

            }

            // Get computer's random num for choice 

            Random rand = new Random();

            int RandomComputerChoice = rand.Next(0,2); 

            // Console.WriteLine("Computer chooses " + RandomComputerChoice); 

            // Console.WriteLine(rand.Next()); 

​

            string ComputerChoiceWord;

            if (RandomComputerChoice == 0)

            {

                ComputerChoiceWord = "Scisscors"; 

                // Console.WriteLine("Computer picks " + ComputerChoiceWord + ", which is value " + RandomComputerChoice);

                Console.WriteLine("Computer picks " + ComputerChoiceWord);

                Console.WriteLine();

            }

            else if (RandomComputerChoice == 1)

            {

                ComputerChoiceWord = "Paper"; 

                // Console.WriteLine("Computer picks " + ComputerChoiceWord + ", which is value " + RandomComputerChoice);

                Console.WriteLine("Computer picks " + ComputerChoiceWord);

                Console.WriteLine();

            }

​

            else

            {

                ComputerChoiceWord = "Rock"; 

                // Console.WriteLine("Computer picks " + ComputerChoiceWord + ", which is value " + RandomComputerChoice);

                Console.WriteLine("Computer picks " + ComputerChoiceWord);

                Console.WriteLine();

            }

​

            // User chooses rock 

            if (UserChoiceNumber == 2)

                {

                    // Console.WriteLine(UserChoiceNumber);

​

                    GameResultNumber = (RandomComputerChoice - UserChoiceNumber);

                    // Console.WriteLine(GameResultNumber);

                    Console.WriteLine();

​

                    if (GameResultNumber == 0)

                        {

                            Console.WriteLine("Draw!");

                        }

                    else if (GameResultNumber == -2)

                        { 

                            Console.WriteLine("User Wins! :D");

                            UserScore = UserScore + 1;

                        }

                    else 

                        { 

                            Console.WriteLine("User Loses! T^T");

                            ComputerScore = ComputerScore + 1;

                        }

                } 

​

    // User chooses scisccors or paper

​

            else 

                {

​

                    //Console.WriteLine(UserChoiceNumber);

​

                    GameResultNumber = (RandomComputerChoice - UserChoiceNumber);

                    // Console.WriteLine(GameResultNumber);

                    Console.WriteLine();

​

                    if (GameResultNumber == 0)

                        {

                            Console.WriteLine("Draw!");

                        }

                    else if (GameResultNumber == 1)

                        { 

                            Console.WriteLine("User Wins! :D");

                            UserScore = UserScore + 1;

                        }

                    else 

                        { 

                            Console.WriteLine("User Loses! T^T");

                            ComputerScore = ComputerScore + 1;

​

                        }

                    }

            Console.WriteLine("Do you want to play again?");

            Console.WriteLine();

            Console.WriteLine("Type [Y] to play again or [E] exist");

            UserWantsToPlay = Console.ReadLine();

        // end while loop

        }

        Console.WriteLine();

        Console.WriteLine("The final score....");

        Console.WriteLine();

        Console.WriteLine("Computer won " + ComputerScore + " times.");

        Console.WriteLine("User won " + UserScore + " times.");

        Console.WriteLine();

        Console.WriteLine("Thank you for playing!");

        Console.WriteLine();

        Console.WriteLine();

        Console.WriteLine();

        }

}