宅男福利社

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.猪猪侠在日常虚拟训练系统中与变年轻的父亲巴罗相遇，却发现这是黑暗世界的又一次阴谋，他带着同伴们将计就计，进入黑暗世界直面自己的身世之谜，将威胁彻底消除。他的父亲也最终醒悟，把猪猪侠送回童话世界。理查﹝乔纳森•莱斯筐•梅耶斯饰﹞原本只是个在驻法美国大使馆工作的低阶情报探员，却因缘际会和枪法神准却爱开玩笑的高阶探员瓦克斯﹝约翰•特拉沃塔饰﹞搭档，一起阻止恐怖攻击。刚才若是下人把这信报到前面去，没准就会吓出人命。