北京地铁换乘查询系统查询系统主要包括调⑴用文件初始化地铁线路与图中的顶点函数，⑵初始化图的函数，⑶查看地铁线路详细信息函数，⑷在图中定位起始站与终点站的位置函数，⑸在地铁线路中判定每次经过的站始发为换乘站的函数，⑹花费最少时间查找最短路径的核心函数，⑺输出最短路径函数，⑻在途中需要的换乘信息函数，⑼主要功能实现函数，⑽操作选择函数，⑾主界面函数与查询界面函数。-Beijing subway transfer query system queries the system mainly includes the adjustment after a file initialization subway lines and the vertex function, function of the initialization graph, and (3) check subway lines with information function. [4] in figure in locating the starting station and the end station position function, the in the subway line judge every time after the departure station station transfer function, the cost minimum time to find the shortest path to the core function