Sams Teach Yourself C in 21 Days

Working with C++ Classes and Objects 669

BD3

43: //----------------------------------------

44: void print_time(struct time tm)

45: {

46: cout << tm.hours << “:” << tm.minutes << “:” << tm.seconds;

47: }

48:

49: // Add 1 to the number of hours

50: //------------------------------

51: void add_hour(struct time *tm)

52: {

53: tm->hours += 1;

54: while (tm->hours >= 24 )

55: {

56: tm->hours -= 24;

57: }

58: }

59:

60: // Add 1 to the number of minutes

61: //------------------------------

62: void add_minute(struct time *tm)

63: {

64: tm->minutes += 1;

65: while (tm->minutes >= 60)

66: {

67: add_hour(tm);

68: tm->minutes -= 60;

69: }

70: }

71:

72: // Add 1 to the number of seconds

73: //------------------------------

74: void add_second(struct time *tm)

75: {

76: tm->seconds += 1;

77: while (tm->seconds >= 60)

78: {

79: add_minute(tm);

80: tm->seconds -= 60;

81: }

82: }

Start time: 7:10:15

End time: 11:20:30

Start time: 7:10:15

New end time: 12:21:31

As you can see, Listing B3.2 differs from Listing B3.1 in a couple of ways. The

first is that the three add...functions have been added to the listing. The

LISTINGB3.2 continued

OUTPUT

ANALYSIS

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