#include<iostream>
using namespace std;


struct fraction {
	long int numerator;
	long int denominator;
	fraction(long int n, long int d){
		numerator = n;
		denominator = d;
	}
	double decimal() const {
		if(denominator == 0)
			throw runtime_error("Divide by Zero");
		return (double)numerator / denominator;
	}

	friend ostream& operator<< (ostream& output, const fraction& f){
		try {
			double dec = f.decimal();
			return output << f.numerator << "/" << f.denominator << " = " << dec;
		} catch (runtime_error e) {
			return output << f.numerator << "/" << f.denominator << " can't be divided";
		}
	}
};

int main(){
	fraction half(1, 2);
	cout << half << endl;

	fraction quarter(1, 4);
	cout << quarter << endl;

	fraction nothing(1, 0);
	try {
		cout << nothing.decimal() << endl;
	} catch (runtime_error e) {
		cout << "Can't divide nothing\n";
	}

	cout << nothing << endl;
	
	return 0;
}