国产综合在线

董翳大军到到达城武，逼近单父县，城中百姓闻听后迅速逃窜，前往附彭城一带和齐地避难。以伪装的身份爱上她，当危机来临，在感情和身份之间他该如何选择？你们看，这《女诫》第二章夫妇：开头说男人若是不贤，就不能管住自己的媳妇，在媳妇跟前也端不起架子。郑氏舒了口气，道：去吧。In real life, China's income tax is divided into enterprise income tax, foreign-invested enterprises or foreign-invested enterprises income tax and personal income tax. For these three types of income tax, each is calculated in a different way. Personal income tax has a personal income tax calculation method, while enterprise income tax has its corresponding calculation method. If we do not adopt the policy mode to realize such a requirement, we will define an income tax class, which has an attribute to identify the type of income tax and a CalculateTax () method to calculate the tax. In this method, we need to judge the tax type and calculate the income tax for different tax types through if-else statements. Such an implementation can indeed solve this scenario, but such a design is not conducive to expansion. If the system needs to add an income tax in the later period, it has to go back and modify the CalculateTax method to add an additional judgment statement, which clearly violates the principle of "open-closed". At this time, we can consider using the strategic mode to solve this problem. Since the tax method is the changing part of this scenario, we can naturally think of abstracting the tax method at this time, which is also the essence of the implementation of the strategic mode.我说你就不能把脚好好洗洗干净嘛？哎呀。陈奎虽然这么说，但内心里和所有人一样，同样在疑惑。