#include <iostream>

using namespace std;

class Fraction			// num/den
{	int num, den;
public:
	// constructors
	Fraction()
	{	num=0;   den=1; }
	Fraction(int n, int d)
	{	num=n; den=d;	}
	// transf.
	void Set(int n, int d)
	{	num=n; den=d;	}
	// observer
	Fraction operator* (Fraction other)	// overloading '*'
	{	Fraction  temp;
		temp.num = num * other.num;
		temp.den = den * other.den;
		return temp;
	}
	Fraction operator+ (Fraction o)
	{	Fraction t;
		t.num = num*o.den + den*o.num;
		t.den = den * o.den;
		return t;
	}
	void Print() const
	{	cout << num << "/" << den;  }
};

int main()
{	Fraction x, y, z, ans;	// 0/1
	
	ans = x + y * z; 
	ans.Print();

	cout << "\n\nDone.\n\n";
	return 0;
}