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

int main()
{
	cout << "Input the dividend: ";
	double dividend {0.0};
	cin >> dividend;

	if (!cin) {
		cerr << "Sorry, that wasn't a valid number.\n";
		return EXIT_FAILURE;
	}

	cout << "Input the divisor (can't be zero): ";
	double divisor {1.0};
	cin >> divisor;

	if (!cin) {
		cerr << "Sorry, that wasn't a valid number.\n";
		return EXIT_FAILURE;
	}

	if (divisor == 0.0) {   //a double equal sign means "comparison"
		cerr << "Sorry, the divisor can't be zero.\n";
		return EXIT_FAILURE;
	}

        cout << "The quotient is " << dividend / divisor << "\n";
        return EXIT_SUCCESS;
}