// Inheritance demo for CSE 143
// Copy constructors, etc. omitted to save space
// HP  10/00

#include <iostream>
#include <string>
using namespace std;

class Critter {		// generic creature (abstract)
public:
	Critter(string name);
	virtual string speak( ) = 0;
	virtual string getName( );
private:
	string name;	// name of creature
};

Critter::Critter(string name) {
	this->name = name;
}

string Critter::getName( ) {
	return name;
}

// Class Bird

class Bird: public Critter {
public:
	Bird(string name);
	virtual string speak( );
};

Bird::Bird(string name) : Critter(name) { }

string Bird::speak( ) {
	return "chirp!";
}

// Cows

class Cow: public Critter {
public:
	Cow(string name);
	virtual string speak( );
};

Cow::Cow(string name) : Critter(name) { }

string Cow::speak( ) {
	return "Help! I've been tipped, and I can't get up!!";
}

// test program

// print critter c's name and sound
void describe(Critter &c) {
	cout << "A critter named " << c.getName( ) 
		<< " says: " << c.speak( ) << endl;;
}

int main( ) {
	Bird tweety("Tweety");
	Cow clarance("Clarance");

	describe(tweety);
	describe(clarance);

	cout << endl;
	return 0;
}