该程序实现图的建立与先深和先广遍历，图采用矩阵存储，在遍历过程中用栈实现，但若改用队列，将会实现得更自然流畅-the program plans to establish the first and the first deep-Traversal, map storage matrix, Traversing in the process of making Stack, but switch queue, there will be more natural and fluid