// File: Array.h
//
#ifndef ARRAY_H
#define ARRAY_H

// Abstract base class

class Array {

public:
   Array() ;
   virtual ~Array() ;      // virtual destructor!

   // "pure" virtuals
   virtual void print() = 0 ;   

   unsigned int length() ;
   void sort() ;

protected:
   // "pure" virtuals for sorting
   virtual void swap(unsigned int i, unsigned int j) = 0  ;
   virtual int cmp(unsigned int, unsigned int) = 0 ;

   unsigned int size ;

} ;

#endif