//      CS212 Assignment 3
//      Due: Monday, February 28
//
//      File Name: fraction3.cpp
//      Author: Symonne Newsome
//      Instructor: Dr. Wang
//
//      Compile: g++ fraction3.cpp
//      Run:    ./a.out < fraction.txt > out3.txt
//
//	Goal: a Fraction class that contains the function members 
//	to be able to add, subtract, divide, and reduce fractions. Hand in the 
//	copies of the code and the output file.

#include <iostream>
using namespace std;

class Fraction		
{	int nume;
	int deno;

public:
	void reduce()
	{	
		int n = nume;
		int d = deno;
	
		while ( d != 0)
		{	int r = n % d;
			n = d;
			d = r;
		}
	
		if (n != 0)
		{	nume /= n;
			deno /= n;
		}
	
		if (deno < 0)
		{
			nume *= (-1);
			deno *= (-1);
		}
	}


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 operator+(Fraction x) 
	{	Fraction ans;			
		ans.nume = nume * x.deno + deno * x.nume;
		ans.deno = deno * x.deno;
		ans.Set(ans.nume, ans.deno); 
		ans.reduce();
		
		return  ans;
	}
	Fraction operator-(Fraction x)
        {       Fraction ans;           
                ans.nume = nume * x.deno - deno * x.nume;
                ans.deno = deno * x.deno;
                ans.Set(ans.nume, ans.deno);
                ans.reduce();
		return  ans;
        }
	Fraction operator*(Fraction x)
        {       Fraction ans;           
                ans.nume = nume * x.nume;
                ans.deno = deno * x.deno;
                ans.Set(ans.nume, ans.deno);
                ans.reduce();
		return  ans;
        }
	Fraction operator/(Fraction x)
        {       Fraction ans;          
                ans.nume = nume * x.deno;
                ans.deno = deno * x.nume;
                ans.Set(ans.nume, ans.deno);
                ans.reduce();
		return  ans;
        }

};

int main()
{
	int a1, b1;
	int a2, b2;
	char dummy, op;

	cin >> a1 >> dummy >> b1;
	cin >> op;
	cin >> a2 >> dummy >> b2;

	Fraction f1, f2, answer;
	f1.Set(a1, b1);
	f2.Set(a2, b2);

	while(cin)
	{
		if(op == '+') answer = f1 + f2;
	        if(op == '-') answer = f1 - f2;
        	if(op == '*') answer = f1 * f2;
        	if(op == '/') answer = f1 / f2;


		cin >> a1 >> dummy >> b1;
  	        cin >> op;
        	cin >> a2 >> dummy >> b2;
		
		f1.Set(a1, b1);
	        f2.Set(a2, b2);

		f1.Print();
		cout << " " << op << " ";
		f2.Print();
		cout << " = "; 	
		answer.Print();
		cout << endl;

	
}

	return 0;
}