#include <iostream>

using namespace std;

class Rational
{
public:
	// constructor
	Rational(int n = 0, int d = 1);

	// sets to n / d
	bool set(int n, int d);

	// accessor functions
	int num() const;
	int den() const;

	// returns decimal equivalent
	double decimal() const;


private:
	int num_, den_; // numerator and denominator
};

int main()
{
	cout << "Hello World!\n";

	Rational r1;
	Rational r2(3, 4);
	cout << r1.num() << "/" << r1.den() << '\t' << r1.decimal() << endl;
	cout << r2.num() << "/" << r2.den() << '\t' << r2.decimal() << endl;

	return 0;

}

// constructor
Rational::Rational(int n, int d) {
	set(n, d);
}

bool Rational::set(int n, int d)
{
	if (d != 0) {
		num_ = n;
		den_ = d;
		return true;
	}
	else
		return false;
}

// accessor functions
int Rational::num() const {
	return num_;
}
int Rational::den() const {
	return den_;
}

// returns decimal equivalent
double Rational::decimal() const {
	return num_ / double(den_);
}