实验要求：（1）理解图顶点和边的存储方法：邻接矩阵和邻接表；（2）理解图的遍历算法，掌握其应用；（3）应用图的遍历算法判断图是否连通和两顶点间是否存在路径。-Experimental requirements: (1) to understand the storage method: Figure the vertices and edges adjacency matrix and adjacency list　(2) to understand graph traversal algorithm grasp the application　(3) application of graph traversal algorithm to determine whether the graph connectivity between the two vertices the existence of the path.