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另一人不耐烦地说道：行了，谁不知你忠心？没见少爷疼得不耐烦吗？还只管啰嗦。[Time of Publication] March 30, 2016We can call this object that specializes in Pizza a factory. Take a look at the implemented code:During this period, all the people present registered the investment information and list, and several of my investor friends, I also entrusted Dahei to help register:Liskov Substitution Principle, LSP (Richter Substitution Principle) means that subclasses must replace their parent types. In other words, in the process of software development, after the subclass replaces the parent class, the behavior of the program is the same. Only when the subclass replaces the parent class and the function of the software is not affected can the parent class be truly reused, and the subclass can also add new behaviors to the parent class. In order to look at an example of violation of LSP principles, the specific code is as follows:Samp4_5, an example program, demonstrates the use of these time and date-related classes, and its runtime interface is shown in Figure 1.