#include <iostream>
#include <cstdlib>
using namespace std;

int main()
{
	int age{0};
	cout << "How old are you?\n";
	cin >> age;

	if (!cin) {
		cerr << "That is not an acceptable age!\n";
		return EXIT_FAILURE;
	}
	const int dogAge {age * 7};
	cout << "That's " << dogAge << " in dog years!!!\n";

	return EXIT_SUCCESS;
}