/// <summary>
/// invalidInputMessage(int, int) a function to show/display the warning after invalid input in console screen.
///
/// parameters:
/// left: indicating the left posotion of the console window.
/// top: indicating the top posotion of the console window.
/// </summary>
private void invalidInputMessage(int left, int top)
{
Console.Clear();
ChangeConsoleColors.to_error_ForegroundColor();
Console.SetCursorPosition(left, top);
Console.WriteLine("{0} is not a valid input!!!", input.KeyChar);
ChangeConsoleColors.to_Console_Default_ForegroundColor();
}
