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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.No comment yet该剧以诙谐幽默的方式讲述了苦逼程序员周铁农和创业伙伴抗日剧编剧罗开旺在青橙芒果咖啡店里路演融资而发生的多姿多彩的故事。作为青橙芒果咖啡的常客，周铁农和罗开旺经常会有一些别出心裁的奇思妙想，在咖啡店里视觉享受着店花曼玉36F曼妙身材的同时，不停的用各种创业idea吸引老谋深算的张总来投资，从而引发了各种各样有趣的故事。2. Expansion in different places faces problems such as store selection and different policies for running schools in different places.杨参议大老远舍命相救，岂能……梁振刚一转头，见是海瑞，立刻改口，哦……那你先去忙吧。安德在一家屠宰场担任着财务总监的职位，他没有朋友，没有恋人，每天独来独往，早已经习惯了这样孤单的生活。一天，安德的屠宰场里新来了一名质检员名叫玛利亚，虽然安德自认为自己的性格已经足够内向了，但玛利亚比他还要“社恐”，她不仅有着交流障碍，还患有强迫症，对除了工作以外的人际交往避之而不及。是我，那年听娘说了这个问题，觉得好难过。