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9-4 Number of diners: In the program written to complete Exercise 9-1, add an attribute named number_served and set its default value to 0. Create an instance named restaurant from this class; Print how many people have eaten in this restaurant, then modify this value and print it again. ?The shortcut key for the move command is "M"小葱盯着他，眼神凌厉，手一扬，一点寒光扑面飞来。姜无甩掉追兵掉进湖里，磁力器带他穿越时空到了2010年，姜无一身古装落在了大街上，姜无来到永王 府，正巧有个剧组在拍摄古装剧，因为他长相酷似大明星于清斌，被当成了演员，一群影迷尾随而至。美女作家叶子也在其中，她长相酷似郡主被姜无当成了郡主。姜无跟着叶子回到家，誓死要保护叶子，叶子无奈收留了他，姜无不小心把叶子租的房子弄着了火，害的叶子无家可归。叶子送姜无到了于清斌家，正巧遇到于清斌的经纪人，他正在为于清斌失踪而发愁。他俩想出一个妙计，用姜无代替于清斌去拍摄广告，一个明朝人和姜无和明星于清斌上演了一出真假明星秀。If the scores are all the same, let their respective total scores be higher than the total points lost, and the ratio is larger to win.宋义要离开？走出大帐，项羽、尹旭、英布面面相觑，一头雾水。