亚洲日韩欧美在线AV

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.对我们越国而言，首先稳稳地拿下淮南总是没错的。The fighting situation at position 149 to be talked about next is many different from that at positions 169 and 142 mentioned earlier, because for the first time there is a "flying unit" among the "living biological weapons" appearing at position 149.Speaking of which, the key question comes, that is, how does one capture an event? This involves the bubbling of the incident.Attached, casually tested a game