| 源码简介： |
系统的模块主要划分为：1、增加航线 5、预订机票 2、查询航线 6、退订机票 3、修改航线 7、清空系统 4、删除航线 8、退出系统-The module of the system is divided into: 1, increase route 5, book flights 2, the query route 6, unsubscribe ticket 3, modified route 7, empty the system 4, delete the route 8, out of the system
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