exception_01.cpp

#include <iostream>
#include <stdexcept>

using namespace std;

int safeDivide(int a, int b) {
	if (b == 0) 
		throw invalid_argument("Division by 0");

	return a / b;
}

int main() {
	try {
		
		cout 
			<< "10 / 2 = " 
			<< safeDivide(10, 2) 
			<< endl;

		cout 
			<< "5 / 0  = " 
			<< safeDivide(5, 0) // throws exceptions
			<< endl;
		cout 
			<< "(never executed) 6 / 3  = " 
			<< safeDivide(6, 3) 
			<< endl;

	} catch (const invalid_argument& e)
	{
		cout << "caught exception: " << e.what() << endl;
	}
	return 0;
}

std::domain_error is probably more appropriate.