Question

这是模板的意思：

def __init__(self):
    ## Initialize the instance variable that represents the count

我写道：

class Counter:
def __init_(self):
    self.__count = 0
def get_count(self):
    return self.__count
def increment(self):
    return self.__count == self.__count+ 1
def set_count(self, value):
    self.value = 0

import Counter
def main():
  # The following causes the constructor to be invoked:  __init__()
  score_counter = counter.Counter()  
  print(score_counter.get_count())   # Display the current value of counter
  for points in range(10):           # Increment the counter 10 times
    score_counter.increment()
  score_counter.set_count(100)       # Set counter to 100
  print(score_counter)               # Displays str representation of counter `

“计数”应以0递增，依此类推，但永远保持0。

__init__部分我要写什么？

Answer 1

问题是您的increment功能。它不会递增__count变量，而是检查self.__count是否等于self.__count+ 1并返回答案（即True或False）< / p>

要解决此问题，请更改

return self.__count == self.__count+ 1

到

self.__count = self.__count+ 1

Answer 2

您要执行的操作的简单，干净的实现：

class foo:    

    def __init__(self):
        self.count = 0

    def get_count(self):
        print(self.count)
        return self.count

    def increment_count(self):
        self.count = self.count + 1 


def main():

    # Create the object 
    f = foo()

    # Call the get_count function on the object
    f.get_count() # OUTPUT: 0

    # Increment the counter 
    f.increment_count()

    # Call the get_count function on the object 
    f.get_count()   # OUTPUT: 1


if __name__=="__main__":
    main()

希望这会有所帮助

类计数器初始化

2 个答案: