TwoUp.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Diagnostics;
using System.Threading;
using System.Windows.Forms;

namespace SharedGamesClasses {

    /// <summary>
    /// TwoUp.cs represents game play of Two Up
    /// with the user matched against the computer
    /// </summary>
    public static class TwoUp {

        private const string HEADS = "\nYou threw Heads - you win\n";
        private const string ODDS = "\nYou threw Odds\n";
        private const string TAILS = "\nYou threw Tails - I win\n";

        private const string PLAY_AGAIN = "\n\nPlay again? (Y or N):";
        private const string THROW_COINS = "\nPress any key to throw coins again.";

        private const int PLAYER = 2,
            COMPUTER = 1,
            TIE = 0;
        private static Coin coin1;
        private static Coin coin2;

        private int playerScore = 0;
        private int computerScore = 0;
        private bool playAgain = true;


        //************* more class variables needed **************************

        /// <summary>
        /// Since the class is static, we need to be able to initialise local coins.
        /// </summary>
        public static void SetUpCoins() {
            coin1 = new Coin();
            coin2 = new Coin();
        } //end SetUpCoins


        /// <summary>
        /// Reset all class variables to "zeroed" values,
        /// counters and flags but not the coins.
        ///
        /// used by both Console and GUI to ensure subsequent
        /// playing of the game is correct
        /// </summary>
        public static void ResetGlobals(){
            // Code needed.
        }//end ResetGlobals


        /// <summary>
        /// Plays the game of Two Up until the user decides to stop
        /// Used by Console version only
        /// </summary>
        public static void PlayConsole() {
            // Code needed.
            //Will contain the fuctions from within this class
            int winner = 0;
            do
            {

                ThrowCoins();
                winner = OutputWinner();

                switch (winner) {
                    case TIE:
                        Console.WriteLine(ODDS);
                        playAgain = true;
                        break;

                    case PLAYER:
                        Console.WriteLine(HEADS);
                        playAgain = WantToPlayAgain_ConsoleOnly();
                        break;

                    case COMPUTER:
                        Console.WriteLine(TAILS);
                        playAgain = WantToPlayAgain_ConsoleOnly();
                        break;
                }

            }while (playAgain = true);
            // Before exiting the game, reset class variables
            // to appropriate starting values.
            ResetGlobals();
        }//end PlayConsole

        /// <summary>
        /// Flips both coins
        /// Pre: Local coins 1 and 2 exist
        /// Post: coin1 and coin2 flipped.
        /// </summary>
        public static void ThrowCoins() {
            coin1.Flip();
            coin2.Flip();
        }// end ThrowCoins

        /// <summary>
        /// Determines the winner of the current throw if one exists.
        /// Pre: true
        /// Post: updates class variables appropriately and displays the scorecard if a winner is found.
        /// </summary>
        /// <returns>The number of heads from the current throw: 0, 1, or 2.</returns>
        public static int OutputWinner() {
            int numberOfHeads = 0;
            if (coin1.IsHeads() && coin2.IsHeads()) {
                numberOfHeads = 2;
            } else if (coin1.IsHeads() ^ coin2.IsHeads()) { // OR || would surfice too
                numberOfHeads = 1;
            }

            return numberOfHeads;
        }// end OutputWinner

        /// <summary>
        /// Asks the user if they wish to play again.
        /// Pre:  none
        /// Post: whether the user wishes to play again.
        /// </summary>
        /// <returns>
        /// true if the user wishes to play again,
        /// false otherwise
        /// </returns>
        private static bool WantToPlayAgain_ConsoleOnly() {
            string input;
            bool validInput = false;
            do {
                Console.Write("Play Again? (Y or N): ");
                input = Console.ReadLine().ToUpper();
                validInput = input == "Y" || input == "N";
            } while (!validInput);

            return input == ("Y");
        } // end WantToPlayAgain_ConsoleOnly

        /// <summary>
        /// Displays a prompt and waits for a key press.
        /// Pre:  prompt to display; not null, nor empty
        /// Post: prompt was displayed and user pressed a key.
        /// </summary>
        /// <param name="prompt">the prompt to display to the user</param>
        private static void WaitForKey_ConsoleOnly(string prompt) {
            Debug.Assert(!String.IsNullOrEmpty(prompt), "prompt != null");

            Console.Write(prompt);
            Console.ReadKey();
            Console.WriteLine();
        } // end WaitForKey_ConsoleOnly

    }//end class TwoUp
}//end namespace