#include <iostream>
using namespace std;

class Fraction
{
	int chis;
	int znam;
public:
	int GetChis() const
	{
		return chis;
	}
	int GetZnam() const
	{
		return znam;
	}
	void SetChis(int chis)
	{
		this->chis = chis;
	}
	void SetZnam(int znam)
	{
		this->znam = znam == 0 ? 1 : znam;
	}

	Fraction operator + (/*Fraction* this, */ const Fraction& f2)
	{
		Fraction result;
		result.SetChis(this->GetChis() * f2.GetZnam() + f2.GetChis() * this->GetZnam());
		result.SetZnam(this->GetZnam() * f2.GetZnam());
		return result;
	}
};



void main()
{
	Fraction a;
	a.SetChis(1);
	a.SetZnam(2);
	Fraction b;
	b.SetChis(1);
	b.SetZnam(4);
	Fraction result = a + b;
	Fraction r = a.operator + (b);
	cout << result.GetChis() << " / " << result.GetZnam() << "\n";
}