protected:

string name;

public:

Animal(const string &s="NoName") : name(s) { } // Default value = "NoName"

void speak() { cout << " ANIMAL " << name << " : Hello, I'm " << name << endl; }

void move() { cout << " ANIMAL " << name << " : I'm moving" << endl; }

void eat() { cout << " ANIMAL " << name << " : I'm hungry!" << endl; }

Animal a;

Animal * aPtr;

Animal & aRef = a;

cout << "Animal object:" << endl;

a.speak();

a.move();

a.eat();

cout << endl << "Animal pointer:" << endl;

aPtr = new Animal("Dale");

aPtr->speak();

aPtr->move();

aPtr->eat();

cout << endl << "Animal reference" << endl;

aRef.speak();

aRef.move();

aRef.eat();

return 0;

}