//	1/2 + 3/4 = ?
//

#include <iostream>
using namespace std;

class Fraction		// p.131
{	int nume;
	int deno;
public:
	// 0/1
	Fraction()
	{ 	nume = 0;
		deno = 1;
	}
	Fraction(int n, int d)
	{	nume = n;
		deno = d;
	}
	// function memebers
	void Set(int n, int d)
        {       nume = n;
                deno = d;
        }
	void Print() const
	{	cout << nume << "/" << deno; 	}
	Fraction Addition(Fraction x) 
	{	Fraction ans;		// temporary obj.	
		ans.nume = nume * x.deno + deno * x.nume;
		ans.deno = deno * x.deno;
		return  ans;
	}
	Fraction Subtraction(Fraction x)
        {       Fraction ans;           // temporary obj.
                ans.nume = nume * x.deno - deno * x.nume;
                ans.deno = deno * x.deno;
                return  ans;
        }
	Fraction Multiplication(Fraction x)
        {       Fraction ans;           // temporary obj.
                ans.nume = nume * x.nume;
                ans.deno = deno * x.deno;
                return  ans;
        }
	Fraction Divition(Fraction x)
        {       Fraction ans;           // temporary obj.
                ans.nume = nume * x.deno;
                ans.deno = deno * x.nume;
                return  ans;
        }

};

int main()
{
	Fraction a, b, c;	// c = a + b
	Fraction d, e, f;	// d = a - b; e = a * b

	a.Set(1, 2);	
	b.Set(3, 4);
	
	c = a.Addition(b);
	e = a.Multiplication(b);
	c.Print();
	cout << "\n\n";
	e.Print();

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