中文字日产乱幕7六区小说

Public Memento createMemento () {《藏地密码》讲述了以西藏和藏文化为背景的一个全球大探险故事，其中涉及到西藏千年秘史、藏传佛教历史遗案，以及世界上众多著名文化遗迹。讲述男主人公卓木强巴追查藏獒紫麒麟下落，却在命运的安排下，结识了一帮生死之交，并在他们的帮助下，去寻找西藏失落的神秘宝藏--帕巴拉神庙。For interface programming, a lot of changes that may occur in the system in the future can be isolated. Why? If the code is written for an interface, he can implement the interface with any new class through polymorphism. However, when the code uses a large number of specific classes, once new specific classes are added, the code must be changed. Violating the opening and closing principle.贼已兵临城下，还有什么上策？杨贼既然敢来，就不怕死。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.