说明：  本程序主要实现以下有关的基本操作：（1）基本定义（2）创建图的邻接链表储存（3）图的邻接链表显示（4）图的邻接矩阵显示（5）图的邻接矩阵转化为邻接链表。
(This procedure mainly realize the following basic steps: (1) basic definitions (2) create a graph adjacency list storage (3) graph adjacency list shows (4) graph adjacency matrix display (5) map adjacency matrix conversion for the adjacency list.)