/*
*/

#include <iostream>

using namespace std;

class Fraction
{
	int nume;
	int deno;
	double total;
	char symbol;

public:
	Fraction()
	{	nume = 0; deno = 1;}
	Fraction( int n, int d)
	{	nume =n; deno =d;}
	void Set(int n, int d)
	{	nume = n; deno = d;}
	void Print() const
	{	cout << nume << '/' << deno;	}
	Fraction Mult(Fraction f)
	{	Fraction t;
		int n, d;
		n = nume*f.nume;
		d = deno*f.deno;
		t.Set(n, d);
		return t;
	}
};

int main()
{
	Fraction x, y;
	Fraction z(1, 2);
	int n, d;
	char dummy, op;

	cout << "Input x(n/d, -1/1 to quit: ";
	cin >> n >> dummy >> d;		// 1/2
	while( n!=-1 && d!=1)
	{	
		// Set x =n/d?
		x.Set(n, d);
		cout << "Input y (n/d): ";
		cin >> n >> dummy >> d;	// 1/3
		//Set y = n/d?
		y.Set(n, d);
		cout << "Operation? (+, -, *, /) ";
		cin >> op;
		if( op == '*')
			z = x.Mult(y);
		else
			cout << "I am workign on. \n\n";

		//Debug
		x.Print();
		cout << " " << op << " ";
		y.Print();
		cout << " = ";
		z.Print();
		cout << "\n";		

		cout << "\n\nInput x (n/d, -1/1 to quit: ";
		cin >> n >> dummy >> d;
	}
	cout << "Done." << endl;
	
	return 0;
}