输入根据用户的输入信息，建立二叉树的二叉链表。
Enter the information based on user input, the establishment of binary binary tree list.
说明：二叉树操作：建立二叉树，前序遍历二叉树、中序、后序遍历二叉树。
Binary tree operation: create a binary tree, before traversing binary, inorder, postorder binary tree traversal.
阐述箱体类零件形状特征及形状特征二叉树建立过程。
The form feature of box part and establishing process of form feature binary tree are expounded.
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