oid Rational::setChis(int x0){
	this->x = x0;
}
void Rational::setZnam(int y0){
	this->y = y0;
}
Rational operator +(Rational T1, Rational T2){
	Rational T = T1;
	T.setChis(T1.chis()*T2.znam() + T2.chis()*T1.znam());
	T.setZnam(T1.znam()*T2.znam());
	T.reduce();
	return T;
}