42 lines
1.0 KiB
Python
42 lines
1.0 KiB
Python
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def format_time(hh, mm, ss):
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return f"{hh:02d}:{mm:02d}:{ss:02d}"
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class Timer:
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def __init__(self, hours, minutes, seconds):
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self.__hours = hours
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self.__minutes = minutes
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self.__seconds = seconds
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def __str__(self):
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return format_time(self.__hours, self.__minutes, self.__seconds)
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def next_second(self):
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self.__seconds += 1
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if self.__seconds > 59:
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self.__seconds = 0
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self.__minutes += 1
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if self.__minutes > 59:
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self.__minutes = 0
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self.__hours += 1
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if self.__hours > 23:
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self.__hours = 0
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def prev_second(self):
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self.__seconds -= 1
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if self.__seconds < 0:
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self.__seconds = 59
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self.__minutes -= 1
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if self.__minutes < 0:
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self.__minutes = 59
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self.__hours -= 1
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if self.__hours < 0:
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self.__hours = 23
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timer = Timer(23, 59, 59)
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print(timer)
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timer.next_second()
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print(timer)
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timer.prev_second()
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print(timer)
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