说明：  旅游交通查询系统： 实现功能：火车信息查询、最短路径查询、火车信息编辑、读入修改信息、查看火车信息、查看城市信息。每个功能中又有一些小功能，如火车信息查询中有：按车次查询、按出发地与目的地查询（其中又有最快、最省钱、全部选择）中转站查询、查看火车信息，火车信息编辑又包括：添加火车信息、删除火车信息、查看火车信息、保存火车信息功能。
(Tourist traffic query system: functions: Train information query, shortest path query, train information editing, read into modifying information, view train information, view city information. Each function and some small features, such as train information inquiries: press trips inquiries, departure and destination query (of which there are the fastest, cheapest, select all) a transit point for queries, view train information The train also includes information editing: add train information, delete the information of the train to see the train information, save train information.)