#include <iostream>
#include <cstdlib>

using namespace std;

int main()
{
	cout<<"Enter your age in years:";
	double ageInYears {0.0};
	cin >> ageInYears;

	if (!cin) {
		cerr<<"ERROR:Invalid age value";
		return EXIT_FAILURE;
	}
	const double ageInHours {ageInYears * 24 * 365};
	cout << "You are " << ageInHours << " hours old!\n";
	return EXIT_SUCCESS;
}