Sams Teach Yourself C++ in 21 Days

Handling Errors and Exceptions 743

20

9: public:

10: // constructors

11: Array(int itsSize = DefaultSize);

12: Array(const Array &rhs);

13: ~Array() { delete [] pType;}

14:

15: // operators

16: Array& operator=(const Array<T>&);

17: T& operator[](int offSet);

18: const T& operator[](int offSet) const;

19:

20: // accessors

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

22:

23: // friend function

24: friend ostream& operator<< (ostream&, const Array<T>&);

25:

26: // define the exception classes

27:

28: class xSize {};

29:

30: private:

31: int *pType;

32: int itsSize;

33: };

34:

35: template <class T>

36: Array<T>::Array(int size):

37: itsSize(size)

38: {

39: if (size <10 || size > 30000)

40: throw xSize();

41: pType = new T[size];

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

43: pType[i] = 0;

44: }

45:

46: template <class T>

47: Array<T>& Array<T>::operator=(const Array<T> &rhs)

48: {

49: if (this == &rhs)

50: return *this;

51: delete [] pType;

52: itsSize = rhs.GetitsSize();

53: pType = new T[itsSize];

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

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

56: }

LISTING20.9 continued