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You may also like:Each object has its corresponding state, and each state corresponds to some corresponding behaviors. If an object has multiple states, there will be many behaviors. Then the judgment of these states and the behavior completed according to the states will lead to multiple conditional statements, and if a new state is added, the existing code needs to be changed. This kind of design obviously violates the principle of opening and closing, and the state mode is used to solve such problems.　　很快，地方当局发现了迈克的尸体，他身中42刀，死后被肢解和焚烧。更糟的是，军方对迈克遇害的详情闭口不谈。痛失爱子的汉克向当地警方求助，女探员艾米丽·桑德斯(查理兹·塞隆饰)极不情愿的帮助汉克展开了调查。证据表明，迈克是在遇害之后被拖回军事基地管区的。来势凶凶的女主，男主被整得很惨 温柔美丽的女孩总是别人眼中欺负的对象，讨厌的恶女三人组 校园剧必用的一招，英雄救美 恶女三人组遇见女主，没辙了 开始，女二是喜欢男主。你咋能这么说哩？张大栓吓了一跳，抬头无辜地看着孙子道：咋了？板栗气急道：咋了？你怕皇帝，就不顾孙子死活了？他和葫芦对视一眼，均发现一个严重的问题：在爷爷奶奶这样的小民心中，那皇帝就是天上的神，皇上说啥就是啥。A program based on policy mode consists of at least two parts. The first part is a set of policy classes, which encapsulate specific algorithms and are responsible for specific calculation processes. The second part is the environment class Context, which receives the client's request and then delegates the request to a policy class. We first use traditional object-oriented to implement it.黎水也反应过来，傲然对青鸾公主道：不错。