以邻接表为存储结构，实现连通无向图的深度优先和广度优先遍历。以用户指定的结点为起点，分别输出每种遍历下的结点访问序列。 -To the adjacent table for the storage structures, to achieve connectivity of undirected graph depth-first and breadth-first traversal. To user-specified node as a starting point, respectively, under the output of each node traversal visit sequence.