// classes.h -- CSE143 assignment 5 sample solution, 2/99.  HP
// Class definitions for Critters program.

#include <iostream.h>
#include <string.h>


// ----- Critter:  common abstract interface to all Critter classes. -----

class Critter {
public:
	// Construct Critter with description s.
	Critter(const char *s);
	
	// Write Critter description to cout
	void describe( ) const;
	
	// Write noise made by this Critter to cout
	virtual void speak( ) const = 0;
	
private:
	char description[80];	// description of this Critter
};


// ----- Derived Critter class Poodle -----

class Poodle: public Critter {
public:
	// constructor
	Poodle( );
	
	// write noise made by poodles to cout
	void speak( ) const;
};


// ----- Derived Critter class Bovine -----

class Bovine: public Critter {
public:
	// constructor
	Bovine(const char *);
	
	// generic bovines don't have a noise,
	// so Bovine::speak is not provided,
	// which means Bovine is an abstract class
};


// ----- Derived Bovine class Buffalo -----

class Buffalo: public Bovine {
public:
	// constructor
	Buffalo( );
	
	// write noise made by buffalos to cout
	void speak( ) const;
};


// ----- Derived Bovine class Cow -----

class Cow: public Bovine {
public:
	// constructor
	Cow( );
	
	// write noise made by cows to cout
	void speak( ) const;
};