内含源码，以及可执行的exe文件，系统使用说明（tc2.0下运行）。程序可以实现以下功能：

1.　　创建无向网。可以输入最多30个城市的信息（输入的城市是连通的）：城市的名字，两个城市之间的距离，两个城市之间的票价。

2.　　以文件的形式保存输入的城市的信息。

3.　　求连通所有城市的最短路径，并用图形界面显示最短路径。

4.　　求任意两个城市之间的的最短路径，并用图形界面显示最短路径。

5.　　用图形界面显示网络

程序在TC2.0下实现，dos界面，适合C语言初学者练习-Containing source code, and executable exe files, the system for use (tc2.0 run). Procedures can achieve the following functions: 1. Create undirected network. Can enter a maximum of 30 cities in the information (input of the city is connected): the name of the city, the distance between the two cities, the fare between two cities. 2. In order to document the preservation of the city' s information input. 3. For connectivity of the shortest path to all cities, and graphical interface shows that the shortest path. 4. Demand between any two cities in the shortest path, and graphical interface shows that the shortest path. 5. Use graphical interface shows that the network under TC2.0 procedures, dos interface, suitable for beginners to practice the language C