#include "Vector.h"

class Container {
public:
  virtual double& operator[] (int) = 0;
  virtual int size () const = 0;
  virtual ~Container () {}
};

class Vector_container : public Container {
  Vector v;
public:
  Vector_container (int);
  ~Vector_container ();

  double& operator[] (int);
  int size () const;
};