/* Derived class 'Rational' */

#include <iostream>
#include "Rational.h"

using std::cout;
using std::cin;


Rational::Rational( int numeratorInit, int denominatorInit ) {
  numerator   = numeratorInit;
  denominator = denominatorInit;
}


void Rational::read() {
  cin >> numerator >> denominator; 
}


void Rational::write() const {
  cout << numerator << " " << denominator;
}


bool Rational::isPositive() const {
  if ( ( numerator >= 0 && denominator >= 0 ) ||
       ( numerator <= 0 && denominator <  0 ) )
    return true;
  else
    return false;
}


bool Rational::operator==( Rational other ) const {
  if ( numerator * other.denominator == other.numerator * denominator )
    return true;
  else
    return false;
}


Rational Rational::operator+( Rational other ) const {
  return Rational( numerator * other.denominator + 
		   other.numerator * denominator,
                   denominator * other.denominator );
}


Rational Rational::operator-( Rational other ) const
{
  return Rational( numerator * other.denominator - 
		   other.numerator * denominator,
                   denominator * other.denominator ); 
}


Rational Rational::operator*( Rational other ) const 
{
  return Rational( numerator * other.numerator, 
		   denominator * other.denominator );
}


Rational Rational::operator/( Rational other ) const
{
  return Rational( numerator * other.denominator, 
		   denominator * other.numerator );
}