插入: BSTree Insert(BSTree BST, ElementType X){BSTree Insert(BSTree BST, ElementType X){ if(!BST){//如果是一颗空的二叉树,就新建一个二叉搜索树并返回 BST = (BSTree)malloc(sizeof(struct TNode)); BST->Data = X; BST->Left = BST->Right = NULL; }else{ if(X < BST->Data) BST->Left = Insert(BST->Left,X);//递归插入左子树...