Python 物件導向的綜合應用

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#   物件導向的綜合應用#   計算機：實現一些基本的計算操作，已經列印結果#   --------------- 代碼1  ----------------------def add(x, y):    return x + ydef subtract(x, y):    return x - ydef mulit(x, y):    return x * yprint(add(2, 4))    #   6#   實現   (2 + 4 - 3) * 5res1 = add(2, 4)res2 = subtract(res1, 3)res3 = res2 * 5print(res3) #   15#   --------------- 代碼2 -----------------------class Caculator:    __result = 0    @classmethod    #設定一個首數    def first_value(cls, value):        cls.__result = value    @classmethod    def add(cls, n):        cls.__result +=  n    @classmethod    def subtract(cls, n):       cls.__result -= n    @classmethod    def mulit(cls, n):        cls.__result *= n    @classmethod    def show(cls):        return cls.__resultCaculator.first_value(2)Caculator.add(4)Caculator.subtract(3)Caculator.mulit(5)print(Caculator.show()) #   15#   --------------- 代碼3 -----------------------class Caculator:    def __init__(self, firstNum):        self.__result = firstNum    def add(self, n):        self.__result +=  n    def subtract(self, n):        self.__result -= n    def mulit(self, n):        self.__result *= n    def show(self):        return self.__resultc = Caculator(2)c.add(4)c.subtract(3)c.mulit(5)print(c.show()) #   15#   --------------- 代碼4 容錯處理 -----------------------class Caculator:    def __check_num_zsq(func):        def inner(self, n):            if not isinstance(n, int):                raise TypeError("資料類型錯誤")            return func(self, n)        return inner    @__check_num_zsq    def __init__(self, firstNum):        self.__result = firstNum    @__check_num_zsq    def add(self, n):        self.__result +=  n    @__check_num_zsq    def subtract(self, n):        self.__result -= n    @__check_num_zsq    def mulit(self, n):        self.__result *= n    def show(self):        return self.__resultc = Caculator(2)c.add(4)c.subtract(3)c.mulit(5)print(c.show()) #   15

 

Python 物件導向的綜合應用