❔ ✅ Pass A Function To Another Function?

class MainMenu
{
    public ErrorHandlers errorHandle = new();
    public void ScreenSelection()
    {
        List<string> initialText = new()
        {
            "What Would You Like To Do?",
            "--------------------------",
            "** Submit Answer As 1, 2, or 3 **"
        };

        List<string> initialSelection = new()
        {
            "1) Play Game",
            "2) View Previous Games",
            "3) View Statistics"
        };

        foreach (string text in initialText)
        {
            Console.WriteLine(text);
        };

        foreach (string text in initialSelection)
        {
            Console.WriteLine(text);
        };

        bool isInteger = errorHandle.CheckInputIsInteger(Console.ReadLine(), out int userSelection);
        bool isCurrentIndex = errorHandle.CheckCorrectIndex(
            userSelection, 
            initialSelection, 
            initialSelection.Count, 
            out string selectedAction);

        LaunchGameScreen(selectedAction);
    }

    public void LaunchGameScreen(string selectedAction)
    {
        switch (selectedAction)
        {
            case "play game":
                break;

            case "view previous games":
                break;

            case "view statistics":
                break;

            default:
                errorHandle.InputInvalid("Error Launching Game Screen. Trying Again. Please Wait. . .");
                break;
        }
    }
}

class MainMenu
{
    public ErrorHandlers errorHandle = new();
    public void ScreenSelection()
    {
        List<string> initialText = new()
        {
            "What Would You Like To Do?",
            "--------------------------",
            "** Submit Answer As 1, 2, or 3 **"
        };

        List<string> initialSelection = new()
        {
            "1) Play Game",
            "2) View Previous Games",
            "3) View Statistics"
        };

        foreach (string text in initialText)
        {
            Console.WriteLine(text);
        };

        foreach (string text in initialSelection)
        {
            Console.WriteLine(text);
        };

        bool isInteger = errorHandle.CheckInputIsInteger(Console.ReadLine(), out int userSelection);
        bool isCurrentIndex = errorHandle.CheckCorrectIndex(
            userSelection, 
            initialSelection, 
            initialSelection.Count, 
            out string selectedAction);

        LaunchGameScreen(selectedAction);
    }

    public void LaunchGameScreen(string selectedAction)
    {
        switch (selectedAction)
        {
            case "play game":
                break;

            case "view previous games":
                break;

            case "view statistics":
                break;

            default:
                errorHandle.InputInvalid("Error Launching Game Screen. Trying Again. Please Wait. . .");
                break;
        }
    }
}

using MeksMathGameV3;

class ErrorHandlers
{
    public int tries = 3;

    public bool ReadyCheckInput(string userInput)
    {
        if (userInput.ToLower() == "yes")
        {
            return true;
        }
        else
        {
            return false;
        }
    }

    public bool CheckInputIsInteger(string userInput, out int value)
    {
        if (int.TryParse(userInput, out value))
        {
            return true;
        }
        else
        {
            tries--;
            InputInvalid("Input Is Not An Integer. Try Again!");
        }
        return false;
    }

    public bool CheckCorrectIndex(int userInput, List<string> listObject, int maxValue, out string value)
    {
        if (userInput >= 1 && userInput <= maxValue)
        {
            value = listObject[userInput - 1];
            return true;
        }
        else
        {
            tries--;
            InputInvalid("Input Is Out Of Range For Given List. " +
                "Input A Value Between 0 and " + maxValue);
        }
        value = null;
        return false;
    }

    public void InputInvalid(string error)
    {
        if (tries > 0)
        {
            Console.WriteLine("\n" + error + " " + tries + " Tries Left.");
            // recall function
        }
        else
        {
            Console.WriteLine("\nNunber Of Attempts Reached. Returning To Welcome Screen.");
            Thread.Sleep(2000);
            Console.Clear();

            Program program = new();
            program.WelcomeScreen();
        }
    }
}

using MeksMathGameV3;

class ErrorHandlers
{
    public int tries = 3;

    public bool ReadyCheckInput(string userInput)
    {
        if (userInput.ToLower() == "yes")
        {
            return true;
        }
        else
        {
            return false;
        }
    }

    public bool CheckInputIsInteger(string userInput, out int value)
    {
        if (int.TryParse(userInput, out value))
        {
            return true;
        }
        else
        {
            tries--;
            InputInvalid("Input Is Not An Integer. Try Again!");
        }
        return false;
    }

    public bool CheckCorrectIndex(int userInput, List<string> listObject, int maxValue, out string value)
    {
        if (userInput >= 1 && userInput <= maxValue)
        {
            value = listObject[userInput - 1];
            return true;
        }
        else
        {
            tries--;
            InputInvalid("Input Is Out Of Range For Given List. " +
                "Input A Value Between 0 and " + maxValue);
        }
        value = null;
        return false;
    }

    public void InputInvalid(string error)
    {
        if (tries > 0)
        {
            Console.WriteLine("\n" + error + " " + tries + " Tries Left.");
            // recall function
        }
        else
        {
            Console.WriteLine("\nNunber Of Attempts Reached. Returning To Welcome Screen.");
            Thread.Sleep(2000);
            Console.Clear();

            Program program = new();
            program.WelcomeScreen();
        }
    }
}

public void LaunchGameScreen(string selectedAction)
{
    switch (selectedAction)
    {
        case "play game":
            break;

        case "view previous games":
            break;

        case "view statistics":
            break;

        default:
            errorHandle.InputInvalid("Error Launching Game Screen. Trying Again. Please Wait. . .");
            break;
    }
}

public void LaunchGameScreen(string selectedAction)
{
    switch (selectedAction)
    {
        case "play game":
            break;

        case "view previous games":
            break;

        case "view statistics":
            break;

        default:
            errorHandle.InputInvalid("Error Launching Game Screen. Trying Again. Please Wait. . .");
            break;
    }
}

public bool CheckInputIsInteger(string userInput, out int value)
{
    if (int.TryParse(userInput, out value))
    {
        return true;
    }
    else
    {
        tries--;
        InputInvalid("Input Is Not An Integer. Try Again!");
    }
    return false;
}

public bool CheckCorrectIndex(int userInput, List<string> listObject, int maxValue, out string value)
{
    if (userInput >= 1 && userInput <= maxValue)
    {
        value = listObject[userInput - 1];
        return true;
    }
    else
    {
        tries--;
        InputInvalid("Input Is Out Of Range For Given List. " +
            "Input A Value Between 0 and " + maxValue);
    }
    value = null;
    return false;
}

public bool CheckInputIsInteger(string userInput, out int value)
{
    if (int.TryParse(userInput, out value))
    {
        return true;
    }
    else
    {
        tries--;
        InputInvalid("Input Is Not An Integer. Try Again!");
    }
    return false;
}

public bool CheckCorrectIndex(int userInput, List<string> listObject, int maxValue, out string value)
{
    if (userInput >= 1 && userInput <= maxValue)
    {
        value = listObject[userInput - 1];
        return true;
    }
    else
    {
        tries--;
        InputInvalid("Input Is Out Of Range For Given List. " +
            "Input A Value Between 0 and " + maxValue);
    }
    value = null;
    return false;
}

InputInvalid("Whatevs", () => CheckCorrectIndex(userInput, listObject, maxValue, value));

InputInvalid("Whatevs", () => CheckCorrectIndex(userInput, listObject, maxValue, value));

public int tries = 3;
public void GetUserInput()
{
    Console.ForegroundColor = ConsoleColor.White;
    Console.WriteLine("When You Are Ready To Begin, Enter 'Yes' To Start, Or 'No' To Exit.\n");

    string userReady = Console.ReadLine();

    while (userReady != "yes" || userReady != "no")
    {
        tries--;
        Console.WriteLine("Invalid Input. Enter yes To Begin Or no To exit");
    }
}

public int tries = 3;
public void GetUserInput()
{
    Console.ForegroundColor = ConsoleColor.White;
    Console.WriteLine("When You Are Ready To Begin, Enter 'Yes' To Start, Or 'No' To Exit.\n");

    string userReady = Console.ReadLine();

    while (userReady != "yes" || userReady != "no")
    {
        tries--;
        Console.WriteLine("Invalid Input. Enter yes To Begin Or no To exit");
    }
}

while userReady != "yes" or userReady != "no":
  # show error
  # allow another input
else:
  if userReady == "yes":
    # launch wanted screen
  else:
    # close program

while userReady != "yes" or userReady != "no":
  # show error
  # allow another input
else:
  if userReady == "yes":
    # launch wanted screen
  else:
    # close program

for(var failureCount = 0; failureCount < 3; ++failureCount)
{
    // Retireve User Input
    if (/*User Input is Valid*/)
        break;
}
if (userSelection is null)
    // End Program

for(var failureCount = 0; failureCount < 3; ++failureCount)
{
    // Retireve User Input
    if (/*User Input is Valid*/)
        break;
}
if (userSelection is null)
    // End Program

do
{
    // Get User Input
} while(/*User Input is not valid*/);

do
{
    // Get User Input
} while(/*User Input is not valid*/);

public void GetUserInput()
{
    Console.ForegroundColor = ConsoleColor.White;
    Console.WriteLine("When You Are Ready To Begin, Enter 'Yes' To Start, Or 'No' To Exit.\n");

    string userReady = Console.ReadLine();

    for (int i = 0; i < 3; i++)
    {
        if (userReady != "yes" || userReady != "no")
        {
            Console.WriteLine("Enter Either yes To Start Or no To Exit.");
        }
        else
        {
            break;
        }
    }

    if (userReady == "yes")
    {
        Console.WriteLine("\nStarting Game. Please Wait. . .");
        Thread.Sleep(2000);
        Console.Clear();

        MainMenu mainMenu = new();
        mainMenu.DifficultySelection();
    }
}

public void GetUserInput()
{
    Console.ForegroundColor = ConsoleColor.White;
    Console.WriteLine("When You Are Ready To Begin, Enter 'Yes' To Start, Or 'No' To Exit.\n");

    string userReady = Console.ReadLine();

    for (int i = 0; i < 3; i++)
    {
        if (userReady != "yes" || userReady != "no")
        {
            Console.WriteLine("Enter Either yes To Start Or no To Exit.");
        }
        else
        {
            break;
        }
    }

    if (userReady == "yes")
    {
        Console.WriteLine("\nStarting Game. Please Wait. . .");
        Thread.Sleep(2000);
        Console.Clear();

        MainMenu mainMenu = new();
        mainMenu.DifficultySelection();
    }
}

public void GetUserInput()
{
    Console.ForegroundColor = ConsoleColor.White;
    Console.WriteLine("When You Are Ready To Begin, Enter 'Yes' To Start, Or 'No' To Exit.\n");

    string userReady = Console.ReadLine();

    for (int i = 0; i < 3; i++)
    {
        if (userReady != "yes" || userReady != "no")
        {
            Console.WriteLine("Enter Either yes To Start Or no To Exit.");
        }
        else
        {
            if (userReady == "yes")
            {
                Console.WriteLine("\nStarting Game. Please Wait. . .");
                Thread.Sleep(2000);
                Console.Clear();

                MainMenu mainMenu = new();
                mainMenu.DifficultySelection();
                break;
            }
            else if (userReady == "no")
            {
                Console.WriteLine("\nExiting Game. Please Wait. . .");
                Thread.Sleep(2000);
                Console.Clear();

                Environment.Exit(0);
                break;
            }
        }
    }

    Console.WriteLine("Maximum Number OF Attempts Reached. Exiting Program. . .");
    Thread.Sleep(2000);
    Environment.Exit(0);
}

public void GetUserInput()
{
    Console.ForegroundColor = ConsoleColor.White;
    Console.WriteLine("When You Are Ready To Begin, Enter 'Yes' To Start, Or 'No' To Exit.\n");

    string userReady = Console.ReadLine();

    for (int i = 0; i < 3; i++)
    {
        if (userReady != "yes" || userReady != "no")
        {
            Console.WriteLine("Enter Either yes To Start Or no To Exit.");
        }
        else
        {
            if (userReady == "yes")
            {
                Console.WriteLine("\nStarting Game. Please Wait. . .");
                Thread.Sleep(2000);
                Console.Clear();

                MainMenu mainMenu = new();
                mainMenu.DifficultySelection();
                break;
            }
            else if (userReady == "no")
            {
                Console.WriteLine("\nExiting Game. Please Wait. . .");
                Thread.Sleep(2000);
                Console.Clear();

                Environment.Exit(0);
                break;
            }
        }
    }

    Console.WriteLine("Maximum Number OF Attempts Reached. Exiting Program. . .");
    Thread.Sleep(2000);
    Environment.Exit(0);
}

Welcome To Mek's Math Game!
Some Rules Of Thumb To Remember While Playing:
1) All Answers Are In The Form Of An Integer.
2) If Your Division Answer Gives You A Decimal Like: 0.86, Then Your Answer Is 0
3) This Game Has 3 Difficulties: Easy, Medium, and Hard.
4) None Of The Numbers You Will Encounter On Any Difficulty Will Go Higher Than 100.

When You Are Ready To Begin, Enter 'Yes' To Start, Or 'No' To Exit.

yes
Enter Either yes To Start Or no To Exit.
no
Enter Either yes To Start Or no To Exit.

Welcome To Mek's Math Game!
Some Rules Of Thumb To Remember While Playing:
1) All Answers Are In The Form Of An Integer.
2) If Your Division Answer Gives You A Decimal Like: 0.86, Then Your Answer Is 0
3) This Game Has 3 Difficulties: Easy, Medium, and Hard.
4) None Of The Numbers You Will Encounter On Any Difficulty Will Go Higher Than 100.

When You Are Ready To Begin, Enter 'Yes' To Start, Or 'No' To Exit.

yes
Enter Either yes To Start Or no To Exit.
no
Enter Either yes To Start Or no To Exit.

(userReady != "yes") || (userReady != "no")

(userReady != "yes") || (userReady != "no")

(userReady != "yes") || (userReady != "no")

(userReady != "yes") || (userReady != "no")

user_ready = "yes"

if user_ready != "yes" or user_ready != "no":
  print("wrong input")
else:
  print("correct input")

user_ready = "yes"

if user_ready != "yes" or user_ready != "no":
  print("wrong input")
else:
  print("correct input")

string userReady = "yes";

if (userReady != "yes" || userReady != "no")
{
  Console.WriteLine("wrong input");
}
else
{
  Console.WriteLine("correct input");
}

string userReady = "yes";

if (userReady != "yes" || userReady != "no")
{
  Console.WriteLine("wrong input");
}
else
{
  Console.WriteLine("correct input");
}

!((userReady == "yes") || (userReady == "no"))

!((userReady == "yes") || (userReady == "no"))

NOT(A OR B) = NOT(A) AND NOT(B)

NOT(A OR B) = NOT(A) AND NOT(B)

public void GameSelection(string difficulty)
{
    Console.ForegroundColor = ConsoleColor.White;
    Console.WriteLine("\n");

    List<string> gameTypes = new()
    {
        "Addition",
        "Subtraction",
        "Multiplication",
        "Division"
    };

    foreach (string text in gameTypes)
    {
        Console.WriteLine(text);
    };

    Console.Write("\nPlease Select A Game To Play: ");

    string userSelectedGame = Console.ReadLine();

    for (int i = 0; i < 3; i++)
    {
        if (gameTypes.Contains(userSelectedGame.ToLower()))
        {
            Console.WriteLine("\nDifficulty: " + difficulty + "\nGame: " + userSelectedGame);
            break;
        }
        else
        {
            Console.WriteLine("Enter A Game Choice: addition, subtraction, multiplication" +
                " Or division.");
        }
    }

    GetDesiredQuestions(difficulty, userSelectedGame.ToLower());
}

public void GameSelection(string difficulty)
{
    Console.ForegroundColor = ConsoleColor.White;
    Console.WriteLine("\n");

    List<string> gameTypes = new()
    {
        "Addition",
        "Subtraction",
        "Multiplication",
        "Division"
    };

    foreach (string text in gameTypes)
    {
        Console.WriteLine(text);
    };

    Console.Write("\nPlease Select A Game To Play: ");

    string userSelectedGame = Console.ReadLine();

    for (int i = 0; i < 3; i++)
    {
        if (gameTypes.Contains(userSelectedGame.ToLower()))
        {
            Console.WriteLine("\nDifficulty: " + difficulty + "\nGame: " + userSelectedGame);
            break;
        }
        else
        {
            Console.WriteLine("Enter A Game Choice: addition, subtraction, multiplication" +
                " Or division.");
        }
    }

    GetDesiredQuestions(difficulty, userSelectedGame.ToLower());
}

easy
medium
hard
Please Select A Difficulty: easy

Difficulty: easy


Addition
Subtraction
Multiplication
Division

Please Select A Game To Play: addition
Enter A Game Choice: addition, subtraction, multiplication Or division.
Enter A Game Choice: addition, subtraction, multiplication Or division.
Enter A Game Choice: addition, subtraction, multiplication Or division.

Please Enter The Amount Of Questions You'd Like To Answer (1-100):

easy
medium
hard
Please Select A Difficulty: easy

Difficulty: easy


Addition
Subtraction
Multiplication
Division

Please Select A Game To Play: addition
Enter A Game Choice: addition, subtraction, multiplication Or division.
Enter A Game Choice: addition, subtraction, multiplication Or division.
Enter A Game Choice: addition, subtraction, multiplication Or division.

Please Enter The Amount Of Questions You'd Like To Answer (1-100):