// Rationalv3.h
#ifndef _RATIONAL_H
#define _RATIONAL_H

// needed for definition of ostream and istream classes
#include <iostream>

class Rational {

// declare input and output operators functions as friends
// to the class so they can directly access the private data
friend std::istream& operator>>(std::istream& is, Rational &r);
friend std::ostream& operator<<(std::ostream& os, const Rational &r);

public:
  // constructor
  Rational(const int n = 0, const int d = 1) { set(n, d); }

  // sets to n / d
  bool set(const int n, const int d);  

  // access functions
  int num() const { return num_; }
  int den() const { return den_; }
  
  // returns decimal equivalent
  double decimal() const; 
  
private:
  int num_, den_; // numerator and denominator
};

// prototypes for operator overloading
Rational operator+(const Rational &r1, const Rational &r2);

// declare the non-member input output operator functions
std::istream& operator>>(std::istream &is, Rational &r);
std::ostream& operator<<(std::ostream &os, const Rational &r);

#endif