本程序采用数据结构中提到的Prim算法来求给出的一个图的最小生成树，运行程序之后会显示出最小生成树的起点到每个边节点即构成最小生成树的边，并且会显示出每条边的权值。-The program adopt the frequently used　Prim algorithm to generate a minimum spanning tree, when you run the program, it will show the edge of the minimum spanning tree　from the

starting point to each edge node , and will show the weights of each edge.