国际精品产品卓越拓展

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.小葱则说，眼前事就眼前论，他心神不专，便是在战场也一样。********见此情形，何风心里燃起一线希望，忙叩头说，他是看黎章太年轻，又是才来军中，提拔太快对他并无益处，方才升任他做队长，剩余军功都攒在那儿呢，也是想多磨砺他的意思。一来尹旭没有早睡的习惯，二来如今有很多大事需要考虑，少不得深思熟虑，早了也睡不着。2. Understand macro commands:The first episodes were shot in 1922 and found an end in 1944. Totally there are 221 single episodes. A complete catalog of all episodes you will find at "All movies of Our Gang / The Little Rascals at a glance". A small picture gallery you can find under "Gallery".一个穿着黑白相间的汗衫的青年一脸神秘地说道。