#ifndef _rational_h
#define _rational_h
#include <iostream.h>


template <class Type>
inline Type abs(Type x)
{
	if (x < Type(0))
		return(-x);
	return x;
}


class Rational
{
public:
	Rational(int = 0, int = 1);
	Rational& operator = (const Rational& r);
	Rational operator - ()const;//unary minus
	Rational operator +=(const Rational &r);
	Rational	operator -=(const Rational &r);
	Rational operator /=(const Rational &r);
	Rational operator *=(const Rational &r);
	int less (const Rational & )const;
	int equal (const Rational & )const;
	int lessEqual (const Rational & )const;
	int greater (const Rational & )const;
	int greaterEqual (const Rational &)const;
	int notEqual (const Rational & )const;
	istream& read(istream &s);
	ostream& print(ostream &s)const;
private:
	void simpleRatio();
	int numerator;
	int denominator;
};

ostream& operator << (ostream &s, const Rational &r);
istream& operator >> (istream &s, Rational& r);

Rational operator + (const Rational & r, const Rational & s);
Rational operator - (const Rational & r, const Rational & s);
Rational operator * (const Rational & r, const Rational & s);
Rational operator / (const Rational & r, const Rational & s);
int operator < (const Rational & r, const Rational & s);
int operator == (const Rational & r, const Rational & s);
int operator <= (const Rational & r, const Rational & s);
int operator > (const Rational & r, const Rational & s);
int operator >= (const Rational & r, const Rational & s);
int operator != (const Rational & r, const Rational & s);
#endif