c语言关于二叉树代码

c语言关于二叉树代码#include ; #include ; typedef struct TreeNode { int data; struct TreeNode *lchild, *rchild; }ABTreeNode; ABTreeNode * CreatBiTree() {ABTreeNode *T; int ch; scanf("%d",&ch); if(ch==0) T=NULL; else { T=(ABTreeNode *)malloc(sizeof(ABTree