// inherit15.h		By: Aiman Hanna -  ©1993-2002 Aiman Hanna

#ifndef INHERIT15_H
#define INHERIT15_H

#include <iostream.h>

enum avl_colors { red, black, white, green };
enum yes_no { yes, no };

class Vehicle 
{
public:                             
	// Public: This part is seen by the whole outside world

	Vehicle(  avl_colors clr = white, int cyl = 4 );
//Vehicle( avl_colors, int  );
	void ShowInfo( void );

protected:			    
	// Protected: This part is visible only to: 
		// 1) that class,
		// 2) its friend classes & 
		// 3) its inherited classes
	// Notice that there was no need to have these functions as public.
	// Notice that we could have numcyl & color as private and use initialization 
	// lists to manipulate them when creating objects from the inherited 
	// classes. (In fact, this could still be better, however we keep them here as 
	// protected just to clarify the topic which we are exploring here). 
	 
	
	int GetNumCyl( void );
	char* GetColor( void );

	int numcyl;
	avl_colors  color; 

};


class Bus: public Vehicle
{
public: 
        Bus( avl_colors aclr = black, int cyl = 12, yes_no bar = no );
	void ShowInfo( void );
       	yes_no HasBar ( void );
private: 
	yes_no barexist;

};


class Van: public Bus
{
public:
        Van( avl_colors aclr = white, int cyl = 6, yes_no tur = no ); 
	void ShowInfo( void );
	yes_no IsTurbo( void );
private:
	yes_no turbo;

};

#endif