#ifndef RATIONAL_H
#define RATIONAL_H

#include <iostream.h>

class Rational
{
public:
    friend int operator ==(const Rational& r1, const Rational& r2);
    friend int operator <(const Rational& r1, const Rational& r2);
    friend int operator <=(const Rational& r1, const Rational& r2);
    friend int operator >(const Rational& r1, const Rational& r2);
    friend int operator >=(const Rational& r1, const Rational& r2);
    friend Rational operator +(const Rational& r1, const Rational& r2);
    friend Rational operator -(const Rational& r1, const Rational& r2);
    friend Rational operator -(const Rational& r);
    friend Rational operator *(const Rational& r1, const Rational& r2);
    friend Rational operator /(const Rational& r1, const Rational& r2);
    friend ostream& operator <<(ostream& outs, const Rational& r);
    friend istream& operator >>(istream& ins, Rational& r); 
    //Input must always have a division sign; e.g., for 2, you use 2/1.
    //Input need not be in reduced form.
    double get_double() const;
    //Returns an equivalent value of type double.
    Rational();
    Rational(int new_numerator, int new_denominator);
    Rational(int whole_number);
private:
    void reduce();
    //Changes the representation to reduced form
    //For example if numerator is 2 and denominator is 4 (for 2/4)
    //it changes it to numerator == 1 and denominator == 2 (for 1/2).
    //Adjusts minus sign so that the minus sign (if any)
    //is only on the numerator.
    //(Essentially converts things like 1/-2 to -1/2 and 
    //-1/-2 to 1/2.) It is safest to call reduce before doing
    //any arithmetic in a member function or operator definition.
    int numerator;
    int denominator;
};

#endif //RATIONAL_H