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Next, we will enter the code writing phase of the state mode. First, we will define three state classes, namely offLightState, WeakLightState and strongLightState. All three classes have a prototype method buttonWasPressed, which represents the behavior that will occur when the button is pressed in their respective states. The code is as follows:　　随着“中国共产党万岁”的低声欢呼，一个在日后改变中国、改变世界的政党产生了。我叫陆冰，两点水的那个冰。皇上是个十分有规律的人，多年来，这作息日程从未断过，也从未变过First of all, I would like to thank Jiguo Net very much for giving me the opportunity to experience AnchorChef's low-temperature slow cooking machine. After two days of trial, I have made hot spring eggs, sirloin steak and lamb chops. I have basically become familiar with the operation method of the slow cooking machine and accumulated some experience in use. I would like to make a brief introduction and share my own experience. This report is divided into three parts. After a simple blueprint, let's officially enter the text.即将踏入三十岁的“”资深少女“林北星因为男朋友展宇的毁约，与自己梦想的爱情殿堂擦肩而过，生活工作也变得一团乱麻，不知是被命运眷顾还是来自时光机老人的玩笑，林北星却意外回到了十八岁，高三本是一场噩梦，但林北星却计划着重新高考，摆脱展宇，为了自己重新活一次，然而林北星的美梦却频频被一个叫做张万森的男孩打破。张万森在高考之后的意外遭遇成了结束林北星时空之旅的开关，林北星开始调查张万森的死因，开始了拯救张万森的大作战。高中的日子浪漫又短暂，林北星的改变让她收获了曾经忽略的美好，随着夏天的到来，林北星也发现，她拯救的不仅仅是永远的学霸张万森，还拯救了这个少年对她自儿时起犹如星辰大海的爱恋。