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Pppr=0x804850dLiskov 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:可徐海，还是没有走。叮叮——咛——琴音箫声抑扬顿挫，连绵不绝，声音中只有高雅与从容。《川东游击队》是重庆市庆祝中国共产党成立90周年题材重点电视剧，由著名导演郑晓龙担任总导演；印小天、齐欢、赵春羊等实力派明星领衔主演。1947年夏秋,人民解放战争进入了战略反攻阶段,当年10月,根据中共中央上海局决定,在重庆建立了川东临委统一领导重庆及川东地区党的工作,临委把工作重心转移向农村,发动小规模游击战争,策应主战场军事斗争,由于敌我力量悬殊,斗争十分残酷年初至九月,川东地下党先后组织了三次武装起义,起义的第一枪首先在下川东的云阳,奉节,大宁,巫山一带打响……