Sams Teach Yourself C++ in 21 Days

Handling Errors and Exceptions 725

20

18: // accessors

19: int GetitsSize() const { return itsSize; }

20:

21: // friend function

22: friend ostream& operator<< (ostream&, const Array&);

23:

24: class xBoundary {}; // define the exception class

25:

26: private:

27: int *pType;

28: int itsSize;

29: };

30:

31: Array::Array(int size):

32: itsSize(size)

33: {

34: pType = new int[size];

35: for (int i = 0; i < size; i++)

36: pType[i] = 0;

37: }

38:

39: Array& Array::operator=(const Array &rhs)

40: {

41: if (this == &rhs)

42: return *this;

43: delete [] pType;

44: itsSize = rhs.GetitsSize();

45: pType = new int[itsSize];

46: for (int i = 0; i < itsSize; i++)

47: {

48: pType[i] = rhs[i];

49: }

50: return *this;

51: }

52:

53: Array::Array(const Array &rhs)

54: {

55: itsSize = rhs.GetitsSize();

56: pType = new int[itsSize];

57: for (int i = 0; i < itsSize; i++)

58: {

59: pType[i] = rhs[i];

60: }

61: }

62:

63: int& Array::operator[](int offSet)

64: {

65: int size = GetitsSize();

LISTING20.4 continued