Sams Teach Yourself C++ in 21 Days

Polymorphism 461

14

12: Horse(COLOR color, HANDS height);

13: virtual ~Horse() { cout << “Horse destructor...\n”; }

14: virtual void Whinny()const { cout << “Whinny!... “; }

15: virtual HANDS GetHeight() const { return itsHeight; }

16: virtual COLOR GetColor() const { return itsColor; }

17: private:

18: HANDS itsHeight;

19: COLOR itsColor;

20: };

21:

22: Horse::Horse(COLOR color, HANDS height):

23: itsColor(color),itsHeight(height)

24: {

25: cout << “Horse constructor...\n”;

26: }

27:

28: class Bird

29: {

30: public:

31: Bird(COLOR color, bool migrates);

32: virtual ~Bird() {cout << “Bird destructor...\n”; }

33: virtual void Chirp()const { cout << “Chirp... “; }

34: virtual void Fly()const

35: {

36: cout << “I can fly! I can fly! I can fly! “;

37: }

38: virtual COLOR GetColor()const { return itsColor; }

39: virtual bool GetMigration() const { return itsMigration; }

40:

41: private:

42: COLOR itsColor;

43: bool itsMigration;

44: };

45:

46: Bird::Bird(COLOR color, bool migrates):

47: itsColor(color), itsMigration(migrates)

48: {

49: cout << “Bird constructor...\n”;

50: }

51:

52: class Pegasus : public Horse, public Bird

53: {

54: public:

55: void Chirp()const { Whinny(); }

56: Pegasus(COLOR, HANDS, bool,long);

57: ~Pegasus() {cout << “Pegasus destructor...\n”;}

58: virtual long GetNumberBelievers() const

59: {

LISTING14.4 continued