文本为一个用c语言编写用于产生一个二叉树的源码文本。以三元组形式输入任意二叉树（以大写字母表示结点），求以任意一选定结点为子树的深度。-Text for a c language is used to generate a binary tree of the source text. Enter any form of triples binary tree node (in capital letters), and demand in any one selected node subtr