Sams Teach Yourself C++ in 21 Days

Working with Advanced Functions 319

10

14: void SetAge(int age) { *itsAge = age; }

15: Cat & operator=(const Cat &);

16:

17: private:

18: int *itsAge;

19: int *itsWeight;

20: };

21:

22: Cat::Cat()

23: {

24: itsAge = new int;

25: itsWeight = new int;

26: *itsAge = 5;

27: *itsWeight = 9;

28: }

29:

30:

31: Cat & Cat::operator=(const Cat & rhs)

32: {

33: if (this == &rhs)

34: return *this;

35: *itsAge = rhs.GetAge();

36: *itsWeight = rhs.GetWeight();

37: return *this;

38: }

39:

40:

41: int main()

42: {

43: Cat Frisky;

44: cout << “Frisky’s age: “ << Frisky.GetAge() << endl;

45: cout << “Setting Frisky to 6...\n”;

46: Frisky.SetAge(6);

47: Cat Whiskers;

48: cout << “Whiskers’ age: “ << Whiskers.GetAge() << endl;

49: cout << “copying Frisky to Whiskers...\n”;

50: Whiskers = Frisky;

51: cout << “Whiskers’ age: “ << Whiskers.GetAge() << endl;

52: return 0;

53: }

Frisky’s age: 5

Setting Frisky to 6...

Whiskers’ age: 5

copying Frisky to Whiskers...

Whiskers’ age: 6

OUTPUT

LISTING10.15 continued