#ifndef FRACTION_H
#define FRACTION_H

#include "NumberRep.h"

class Integer;

class Fraction : public NumberRep {
  friend class Integer;
public:
  Fraction(int num, int den);
  void display() const;
  Number add(const NumberRep *r) const;   // *this + *r
  Number div(const NumberRep *r) const;   // *this / *r
  NumberRep * copy() const;
  Number revAdd(const Integer *l) const;  // *l + *this
  Number revDiv(const Integer *l) const;  // *l / *this
  Number revAdd(const Fraction *l) const; // *l + *this
  Number revDiv(const Fraction *l) const; // *l / *this
private:
  int n, d;
};
  

#endif