void RockPaperScissors()
{
    //game is running.
    bool gameisRunning;
    gameisRunning = true;
    char ch;
    // setting variables for the scores, and turns.
    int player_score = 0;
    int playTurn = 0;
    // start of the game loop, the loop will be running until ch == n
    for (int i = 0; i < playTurn; i++)
    {
        if (gameisRunning == true)
        {
            std::string CPUChoices;
            //opens RPS.txt, this will implement the Computer moves.
            std::ifstream inFile;
            inFile.open("RPS.txt");
            char choice;
            std::cout << "Welcome to Rock, Paper, Scissors!" << std::endl;
            //Asking the player to make a choice.
            while (std::getline(inFile, CPUChoices) && gameisRunning)
            {
                std::cout << "Press R for Rock, P for Paper, S for Scissors:" << std::endl;
                playTurn++;
                std::cin >> choice;

                std::cout << "The computer has chosen: " << CPUChoices << std::endl;
                //starting the sequence where 9 possible outcomes can happen.
                if (choice == 'R' && CPUChoices == "R")
                {
                    std::cout << "Rock meets rock, it is a draw." << std::endl;
                    continue;
                }
                else if (choice == 'R' && CPUChoices == "P")
                {
                    std::cout << "Rock has been covered by paper, computer wins." << std::endl;;
                    player_score--;
                }
                else if (choice == 'R' && CPUChoices == "S")
                {
                    std::cout << "Rock beats scissors, player wins." << std::endl;;
                    player_score++;
                }
                else if (choice == 'P' && CPUChoices == "R")
                {
                    std::cout << "Paper covers rock, player wins." << std::endl;
                    player_score++;
                }
                else if (choice == 'P' && CPUChoices == "P")
                {
                    std::cout << "Paper meets paper, it is a draw." << std::endl;
                    continue;
                }
                else if (choice == 'P' && CPUChoices == "S")
                {
                    std::cout << "Paper has been cut by Scissors, computer wins." << std::endl;;
                    player_score--;
                }
                else if (choice == 'S' && CPUChoices == "R")
                {
                    std::cout << "Scissors have been crushed by the rock, computer wins." << std::endl;
                    player_score--;
                }
                else if (choice == 'S' && CPUChoices == "P")
                {
                    std::cout << "Scissors cuts paper, player wins." << std::endl;
                    player_score++;
                }
                else if (choice == 'S' && CPUChoices == "S")
                {
                    std::cout << "Scissors meets scissors, it is a draw." << std::endl;
                    continue;
                }
                else
                {
                    std::cout << "Player has not selected R, P, or S." << std::endl;
                    std::cout << "The game ends on behalf of the user not introducing R, P or S." << std::endl;
                    return;
                }
            }
        }
    }
    if (player_score == 0) std::cout << "It's a draw";
    if (player_score > 0) std::cout << "Player wins by " << player_score;
    if (player_score < 0)
    {
        player_score = player_score * -1;
        std::cout << "Computer wins by " << player_score;
    }
    inFile.close(); // close file after, playing a game of RPS.
}