求二叉树中的宽度 二叉树中具有结点数最多的那一层结点总数即是二叉树的宽度。可以采用分层遍历的方法求出所有结点的-Binary tree for the width of tree nodes with the largest total number of nodes that a layer that is the width of tree. Layered traversal can be used to derive all the way to node