航班查询系统，利用C语言编写的，包括最短路径的查询-Flight check system, using C language, including the shortest path query

这是关于交通流量分配中的最短路径法的C++程序，虽然方法本身引用范围不是很广，但是其原理是其他常用方法的基础。-To find the shortest path in traffic flow assignment.

In this report, we study on the intermodal transportation system of Pearl River Delta city group. In the system, each city is regarded as a node. For convenience, we remove some unimportant cities and simplify the system from 14 nodes to 5 nodes. Bec