#include <iostream>
#include <string>
#include <sstream>
using namespace std;

int main() {
	string Number;
	int answer=0;
	cout << "Enter Number: ";
	getline(cin, Number);
	stringstream(Number) >> answer;
	while (!isdigit(answer)) {
		cout << "\a Incorrect, enter a number: ";
		getline(cin, Number);
		stringstream(Number) >> answer;
	}
	cout << "\nYou have entered: " << answer;
	return 0;
}