<a href='http://blog.csdn.net/wanmeiwushang/article/details/51921821'>参考博客链接</a>

自己写的代码：

 BinTree Insert( BinTree BST, ElementType X )
    {
        if(!BST){
            BST=(BinTree)malloc(sizeof(struct TNode));
            BST->Data=X;
            BST->Left=BST->Right=NULL;
            return BST;
        }
        if(X<BST->Data){
            BST->Left=Insert(BST->Left,X);
        }
        else if(X>BST->Data){
            BST->Right=Insert(BST->Right,X);
        }
        return BST; 
    }
    BinTree Delete( BinTree BST, ElementType X )
    {
        Position Tmp;
        if(!BST){
            printf("Not Found\n");
            return BST;
        }
        if(X<BST->Data) BST->Left=Delete(BST->Left,X);
        else if(X>BST->Data) BST->Right=Delete(BST->Right,X);
        else{
            if(BST->Left&&BST->Right){
                Tmp=BST->Right;
                while(Tmp->Left){
                    Tmp=Tmp->Left;
                }
                BST->Data=Tmp->Data;
                BST->Right=Delete(BST->Right,Tmp->Data);
            }
            else{
                Tmp=BST;
                if(!BST->Left){
                    BST=BST->Right;
                }
                else if(!BST->Right){
                    BST=BST->Left;
                }
                free(Tmp);
            }
        }
        return BST;
    }
    Position Find( BinTree BST, ElementType X ) // 用递归比较好用
    {
        if(!BST) return NULL;
        if(X==BST->Data) return BST;
        else if(X>BST->Data) return Find(BST->Right,X);
        else if(X<BST->Data) return Find(BST->Left,X);
    }
    Position FindMin( BinTree BST )
    {
        if(!BST) return NULL;
        while(BST->Left){
            BST=BST->Left;
        }
        return BST;
    }
    Position FindMax( BinTree BST )
    {
        if(!BST) return NULL;
        while(BST->Right){
            BST=BST->Right;
        }
        return BST;
    }