char GetCharacter(const char *prompt, const char* error, const char validInput[], int validInputLength, CharacterCaseType charCase)
{
	const int IGNORE_CHARS = 256;

	char input;
	bool failure;

	do
	{
		failure = false;

		cout << prompt;
		cin >> input;

		if(cin.fail())
		{
			cin.clear();
			cin.ignore(IGNORE_CHARS, '\n');
			cout << error << endl;
			failure = true;
		}
		else
		{
			cin.ignore(IGNORE_CHARS, '\n');

			if(isalpha(input))
			{
				if(charCase == CC_UPPER_CASE)
				{
					input = toupper(input);
				}
				else if(charCase == CC_LOWER_CASE)
				{
					input = tolower(input);
				}

				for(int i = 0; i < validInputLength; i++)
				{
					if(input == validInput[i])
					{
						return input;
					}
				}
			}

			cout << error << endl;
			failure = true;

		}

	}while(failure);

	return input;
}