#ifndef NUMBERREP_H
#define NUMBERREP_H

#include "Number.h"

class Fraction;
class Integer;

class NumberRep {
public:
  virtual void display() const = 0;
  virtual Number add(const NumberRep *r) const = 0;    // *this + *r
  virtual Number div(const NumberRep *r) const = 0;    // *this / *r
  virtual NumberRep * copy() const = 0;
  virtual ~NumberRep() {}
  virtual Number revAdd(const Integer *l) const = 0;   // *l + *this
  virtual Number revDiv(const Integer *l) const = 0;   // *l / *this
  virtual Number revAdd(const Fraction *l) const = 0;  // *l + *this
  virtual Number revDiv(const Fraction *l) const = 0;  // *l / *this
};
#endif