Introduction - If you have any usage issues, please Google them yourself
(1) define a binary linked list type, the establishment of a binary tree. 2 preorder traversal of binary tree, and output through the results. Sequence in traversing a binary tree, and output through the results. (4) the order of traversing a binary tree, and output through the results. 5-level traversing a binary tree, and output through the results. Find the depth of the binary tree, summary points, the leaf nodes, the replication of a binary tree.