Sams Teach Yourself C++ in 21 Days

36: virtual void SetNumber(unsigned long number) {badNumber =

➥number;}

37: private:

38: unsigned long badNumber;

39: };

40:

41: void RangeError::PrintError()

42: {

43: cout << “Number out of range. You used “;

44: cout << GetNumber() << “!!” << endl;

45: }

46:

47: // func. prototypes

48: void MyFunction();

49: unsigned int * FunctionTwo();

50: void FunctionThree(unsigned int *);

51:

52: int main()

53: {

54: try

55: {

56: MyFunction();

57: }

58: // Only one catch required, use virtual functions to do the

59: // right thing.

60: catch (Exception& theException)

61: {

62: theException.PrintError();

63: }

64: return 0;

65: }

66:

67: unsigned int * FunctionTwo()

68: {

69: unsigned int *myInt = new unsigned int;

70: if (myInt == 0)

71: throw OutOfMemory();

72: return myInt;

73: }

74:

75: void MyFunction()

76: {

77: unsigned int *myInt = FunctionTwo();

78: FunctionThree(myInt);

79: cout << “Ok. myInt: “ << *myInt;

80: delete myInt;

81: }

82:

83: void FunctionThree(unsigned int *ptr)

84: {

85: long testNumber;

86: cout << “Enter an int: “;

872 Appendix D

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