//	File Name:	hw4.cpp 
//	Author:		Tara Santos
//	Due Date:	Wed, Feb. 27
//	Instructor:	Dr. Wang
//	Compilation:	vi hw4.cpp
//	Execution:	g++ hw4.cpp
//	Goal:		This program will read two fractions and an operator
//			+,-,*, or /, output the results

#include <iostream>

using namespace std;

class Fraction
{
	int nume;
	int deno;

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;
		int d;
		n = nume * f.nume;
		d = deno * f.deno;
		t.Set(n,d);
		return t;	}
	Fraction Add (Fraction f)
	{	Fraction s;
		int n;
		int d;
		n = nume * f.deno + deno * f.nume;
		d = deno * f.deno;
		s.Set(n,d);
		return s;	}
	Fraction Sub (Fraction f)
	{	Fraction r;
		int n;
		int d;
		n = nume * f.deno - deno * f.nume;
		d = deno * f.deno;
		r.Set(n,d);
		return r;	}
	Fraction Div (Fraction f)
	{	Fraction q;
		int n;
		int d;
		n = nume * f.nume / deno * f.nume;	
		d = deno * f.deno;
		q.Set(n,d);
		return q;	}
};

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

	cout << "Input x (n/d, -0/0 to quit): " << endl;
	cin >> n >> dummy >> d;
	while(n!= -0 && d!=0)
	{
		x.Set(n,d);
		cout << "Input y (n/d): " << endl;
		cin >> n >> dummy >> d;
		y.Set(n,d);
		cout << "Operation? (+,-,*,/): " << endl;
		cin >> op;
		if (op == '*')
			z = x.Mult(y);
		else 
		
		if (op == '+')
			z = x.Add(y);
		else
		
		if (op == '-')
			z = x.Sub(y);
		else
		
		if (op == '/')
			z = x.Div(y);
		else

		cout << "\n\n";
		
		cout << "z: ";
		x.Print();
		cout << " " << op << " ";
		y.Print();
		cout << " = ";
		z.Print();
		cout << "\n";
		
		cout << "=============================" << endl;
		cout << "Input x (n/d, -0/0 to quit): ";
		cin >> n >> dummy >> d;
	}

	cout << "\nGoodbye." << endl;
	return 0;
}