/*Gönderen Mustafa Başaran */

#include 

#include 

#include 



using std::cout;

using std::cin;

using std::endl;



class rasyonel

{

private:

	int pay;

	int payda;

			

public:

	rasyonel(int a,int b) 

	{

		pay=a;

		payda=b;		

		

	}

	rasyonel()

	{

		pay=1;

		payda=1;

	}

	

	void yaz()

	{

		cout<	}

	int payoku() { return pay;}

	int paydaoku() { return payda;}	

	void kesiryaz(int a,int b) { pay=a;payda=b;}	



};

///////////////////////////////////////////////////

int obeb(int a,int b)

{

	int k,ob=1;

	if(a		k=a;

	else

		k=b;

	

	for(int i=2;i<=k;i++)

	{

		if(a%i==0 && b%i==0)

			ob=i;		

	}

	return ob;

}



//////////////////////////////////////////////////////////

void sadelestir(rasyonel& x)

{

	int a=x.payoku(),b=x.paydaoku(),ob;



	ob=obeb(a,b);

		a=a/ob;

		b=b/ob;

		

		x.kesiryaz(a,b);

}

//////////////////////////////////////////////////////////

void kesiral(rasyonel& x)

{

	int a,b;

	

	cin>>a;

	cout<<"--\n";

	cin>>b;

	

	x.kesiryaz(a,b);

	sadelestir(x);



}

	

/////////////////////////////////////////////////////////////



void paydaesitle(rasyonel& x,rasyonel& y)

{

	int a,b;

	int okek,k1,k2;

	okek=(x.paydaoku()*y.paydaoku())/obeb(x.paydaoku(),y.paydaoku());

	k1=okek/x.paydaoku();

	k2=okek/y.paydaoku();

	a=x.payoku() * k1;

	b=y.payoku() * k2;

	x.kesiryaz(a,okek);

	y.kesiryaz(b,okek);

}



///////////////////////////////////////////////////////////////////////

void topla(rasyonel& x,rasyonel& y,rasyonel& s)

{

	int a;

	paydaesitle(x,y);

	a=x.payoku()+y.payoku();

	s.kesiryaz(a,x.paydaoku());

	sadelestir(s);

	cout<<"toplam=";

	s.yaz();

}

///////////////////////////////////////////////////////////////////////



void cikar(rasyonel& x,rasyonel& y,rasyonel& s)

{

	int a;

	paydaesitle(x,y);

	a=x.payoku()-y.payoku();

	s.kesiryaz(a,x.paydaoku());

	sadelestir(s);

	cout<<"fark=";

	s.yaz();

}

///////////////////////////////////////////////////////////////////////

void carp(rasyonel& x,rasyonel& y,rasyonel& s)

{

	s.kesiryaz(x.payoku()*y.payoku() , x.paydaoku()*y.paydaoku());

	sadelestir(s);

	cout<<"carpim=";

	s.yaz();

}

///////////////////////////////////////////////////////////////////////

void bol(rasyonel& x,rasyonel& y,rasyonel& s)

{

	s.kesiryaz(x.payoku()*y.paydaoku() , x.paydaoku()*y.payoku());

	sadelestir(s);

	cout<<"bolum=";

	s.yaz();

}

///////////////////////////////////////////////////////////////////////





int main()

{

	int sec;

	rasyonel x,y,s;

	cout<<"1.kesri girin\n";

	kesiral(x);

	cout<<"2.kesri girin\n";

	kesiral(y);



	while(1)

	{

	cout<<"\n\n\n";

	cout<<"[1] toplama\n";

	cout<<"[2] cikarma\n";

	cout<<"[3] carpma\n";

	cout<<"[4] bolme\n";

	cout<<"[5] cikis\n";

	cout<<"seciminiz";

	cin>>sec;

	

	

		switch(sec)

		{

		case 1: topla(x,y,s);break;

		case 2: cikar(x,y,s);break;

		case 3: carp(x,y,s);break;

		case 4: bol(x,y,s);break;

		case 5: return 0;

		}

	}

	



	

}