实现南京公交线路查询系统,图形界面，有线路查询（用户输入要查询的公交线路，系统给出被查询线路经过的所有站台）与站站查询（用户输入要查询的上车站点和目的站点，系统给出换乘路线。换乘路线有多

条时，可以给出候多个选。换乘路线必须说明从哪站上坐哪路车，到哪站下换哪路车。　　站站功能有两种功能要求： 1. 给出最少换乘次数的乘车路线； 2. 给出经过最少站台数的乘车路线。 ）完美实现，程序速度极快，采用spfa算法，对于候选路线有独特的过滤方法。-Nanjing bus line query system implementation, graphical interface, a line queries (user input to check the bus lines, the system gives the line after being queried for all sites) and from station to station query (the user enters a query on the bus to the site and destination site, system gives transfer line. transfer a number of routes, the number of election candidates can be given. transfer line must show where which bus station, where for which bus stop. Railway Station function requires two functions: 1. gives the minimum number of bus routes transfer　2. gives the minimum number of stations is traveling through the line.) perfect realization of the program at high speed, using spfa algorithm, a unique route for candidates filtering methods.