输入广义表表示法表示的二叉树的字符串，以#作为字符串结束标志，将广义表形式的字符串创建为链式存储结构的二叉树，并先序、中序和后序遍历该二叉树，输出先序、中序和后序遍历的序列 -Enter the generalized form of binary notation string, with# as a string end marker, the generalized form of the string table storage structure to create the binary tree for the chain, and the first order, the order and post order traversal the binary tree, the output first order, the order and post order traversal sequence