// File: box.h
//
//   Class declaration for the Box class
//

#ifndef _box_h
#define _box_h


class Box {

friend int compare(Box &, Box &) ;

public:
   Box() ;                      // default constructor
   Box(float, float, float) ;   // alternate constructor
   ~Box() ;                     // destructor

   void identify() ;            // prints out vital stats
   static void report() ;       // prints out static members
   
   float volume() ;             // volume of the box
   void grow() ;                // double box dimensions
   void shrink() ;              // halve box dimensions

protected:      // semi-private
   float length ;               // box length
   float height ;               // box height
   float width ;                // box width

   inline int serial() { return serial_number ; } 

private:        // really private
   int serial_number ;          // serial number of this box
   static int count ;           // number of boxes in existence
   static int sequence ;        // number of boxes ever made

} ;


// Returns -1 if first box fits in second
//          1 if second box fits in first
//          0 if neither

int compare(Box&, Box&) ;

#endif