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c++ input until successful

harel12380 answered on February 22, 2024 Popularity 1/10 Helpfulness 1/10

answer c++ input until successful

c++ input until successful

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/*
* clear the buffer
*/
void clearBuffer()
{
	std::cin.clear();
	std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
}

/*
* get input from the user
* @type T - the type of input to get
* @param toPrint - the string to print to the user in order to get the input
* @param isValid - a lambda function that check if the input that the user put is valid
* @return the input of the user
*/
template <class T>
T getUserInput(const std::string& toPrint, std::function<bool(const T&)> isValid)
{
	T userInput;
	bool isFail = false;

	do
	{
		std::cout << toPrint;
		std::cin >> userInput;

		isFail = std::cin.fail();
		if (isFail)
		{
			clearBuffer(); // clear the buffer
			system("cls"); // clear the console
		}
	} while (isFail || !isValid(userInput)); // run until the input is valid

	return userInput;
}

Popularity 1/10 Helpfulness 1/10 Language cpp

Source: Grepper

Tags: c++ input

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Contributed on Feb 22 2024

harel12380

0 Answers Avg Quality 2/10

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