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马须仁(梁朝伟 饰)专门为上市公司提供重组合并方案，是一个年轻有为的钻石王老五；但他的为人却十分刻薄吝啬，女友为了报复将他的信用卡及银行支票全部挂失，恰巧又遇上公众假期，银行都停业了，他突然之间变成了身无分文的“穷人”。ThresholdHttps://www.jiemian.com/article/1893186.html　　柯诺克曾是一名骗徒，改邪归正成了医生，搬到阿尔卑斯山旁的富有山庄，接手退休医师的诊所，他下定决心在这裡赚大钱，不料当地居民个个身强体壮，一点赚头都没有，他只好用诚恳笑容和三寸不烂之舌，强力渲染各种疾病无所不在，没病没痛的村民都被柯诺克诊断出大病大症，还被再三嘱咐要定期回诊，很快地诊所挤满了各式症状的病患，不论病情是真是假。If I were to implement a pizza ordering system, I would definitely write the code like this, because this kind of code can be written subconsciously without consuming our brains. However, take a closer look at this code: the purpose of this method is to order pizza. However, the code for ordering pizza also needs knowledge about the production of pizza. This method must know all pizza. Worse still, if the types of pizza are to be expanded or pizza with poor sales volume are to be deleted in the future, then the code for ordering pizza will be modified. It looks very bad and should be revised. Our first step must be to separate the code for producing Pizza from the code for ordering pizza, because you should not let the code for ordering Pizza know the logic for producing pizza, but should hand over the logic for producing Pizza to a special type. In this way, we can cope with future changes-if we want to add or delete pizza, we can directly modify the producer of pizza without affecting the logic of ordering pizza.