Sams Teach Yourself C++ in 21 Days

Templates 667

19

67: itsSize = rhs.GetSize();

68: pType = new T[itsSize];

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

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

71: }

72:

73: // operator=

74: template <class T>

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

76: {

77: if (this == &rhs)

78: return *this;

79: delete [] pType;

80: itsSize = rhs.GetSize();

81: pType = new T[itsSize];

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

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

84: return *this;

85: }

86:

87: // driver program

88: int main()

89: {

90: Array<int> theArray; // an array of integers

91: Array<Animal> theZoo; // an array of Animals

92: Animal *pAnimal;

93:

94: // fill the arrays

95: for (int i = 0; i < theArray.GetSize(); i++)

96: {

97: theArray[i] = i*2;

98: pAnimal = new Animal(i*3);

99: theZoo[i] = *pAnimal;

100: delete pAnimal;

101: }

102: // print the contents of the arrays

103: for (int j = 0; j < theArray.GetSize(); j++)

104: {

105: std::cout << “theArray[“ << j << “]:\t”;

106: std::cout << theArray[j] << “\t\t”;

107: std::cout << “theZoo[“ << j << “]:\t”;

108: theZoo[j].Display();

109: std::cout << std::endl;

110: }

111:

112: return 0;

113: }

LISTING19.2 continued