// Rationalv2.h
class Rational {
  
public:
  // constructor
  Rational(int n = 0, int d = 1) { set(n, d); }

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

  // access functions
  int num() const { return num_; }
  int den() const { return den_; }
  
  // returns decimal equivalent
  double decimal() const { return num_ / double(den_); }
  
  Rational operator+(const Rational &r2) const;
  
private:
  int num_, den_; // numerator and denominator
};