#include <iostream>
#include <cstdlib>
#include <stdexcept>   //for class runtime_error
using namespace std;

void f();   //function declaration

int main()
{
	try {
		f();
	}

	catch (runtime_error& r) {
		cerr << r.what() << "\n";
		return EXIT_FAILURE;
	}

	return EXIT_SUCCESS;   //Arrive here if no exception was thrown.
}

void f()   //function definition
{
	int dividend {0};
	cout << "What is the dividend? ";
	cin >> dividend;

	int divisor {0};
	cout << "What is the divisor? ";
	cin >> divisor;

	if (divisor == 0) {
		runtime_error re {"Attempted division by zero."};
		throw re;
	}

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