diff --git a/ex9/BST.hpp b/ex9/BST.hpp
new file mode 100644
index 0000000..53f25e2
--- /dev/null
+++ b/ex9/BST.hpp
@@ -0,0 +1,110 @@
+#include "bintree.hpp"
+#include "stack.hpp"
+#include <time.h>
+#include <iostream>
+#include <string>
+
+class BST : binTree<int>
+{
+private:
+    binNodeArray(int) p;
+
+public:
+    BST(int num)
+    {
+        srand(time(NULL));
+        int temp = rand() % 1440;
+        _root->data = temp;
+        _root->pos = "root";
+        std::cout << _root->pos;
+        printf("-%02d:%02d \n", temp / 60, temp % 60);
+
+        for (int i = 0; i < num - 1; i++)
+        {
+            temp = rand() % 1440;
+            p = root();
+            std::string position;
+            while (temp != -1)
+            {
+                if (temp < (p->data))
+                {
+                    if (hasLC(p))
+                    {
+                        p = p->lc;
+                        position.append("0");
+                    }
+
+                    else
+                    {
+                        position.append("0");
+                        addLC(p, temp);
+                        p->lc->pos = position;
+                        std::cout << position;
+                        printf("-%02d:%02d \n", temp / 60, temp % 60);
+                        temp = -1;
+                    }
+                }
+                else if (temp > (p->data))
+                {
+                    if (hasRC(p))
+                    {
+                        p = p->rc;
+                        position.append("1");
+                    }
+
+                    else
+                    {
+                        position.append("1");
+                        addRC(p, temp);
+                        p->rc->pos = position;
+                        std::cout << position;
+                        printf("-%02d:%02d \n", temp / 60, temp % 60);
+                        temp = -1;
+                    }
+                }
+                else
+                {
+                    i--;
+                    temp = -1;
+                }
+            }
+        }
+    }
+    void trav_level()
+    {
+        Queue<binNodeArray(int)> q;
+        q.enqueue(root());
+        while (!q.empty())
+        {
+
+            binNodeArray(int) node = q.dequeue();
+            std::cout << node->pos;
+            printf("-%02d:%02d \n", node->data / 60, node->data % 60);
+
+            if (hasLC(node))
+                q.enqueue(node->lc);
+            if (hasRC(node))
+                q.enqueue(node->rc);
+        }
+    }
+    bool searchPath(binNodeArray(int) root, binNodeArray(int) target, Stack<binNodeArray(int)> *s)
+    {
+        if (root == NULL)
+            return false;
+        s->push(root);
+        if (root->data == target->data)
+            return true;
+
+        bool flag = false;
+        //先去左子树找
+        if (root->lc != NULL)
+            flag = searchPath(root->lc, target, s);
+        //左子树找不到并且右子树不为空的情况下才去找
+        if (!flag && root->rc != NULL)
+            flag = searchPath(root->rc, target, s);
+        //左右都找不到，弹出栈顶元素
+        if (!flag)
+            s->pop();
+        return flag;
+    }
+};
\ No newline at end of file
diff --git a/ex9/binnode.hpp b/ex9/binnode.hpp
new file mode 100644
index 0000000..09cd7e3
--- /dev/null
+++ b/ex9/binnode.hpp
@@ -0,0 +1,47 @@
+#ifndef _binnode_hpp_
+#define _binnode_hpp_
+#include <iostream>
+#include <string>
+#define binNodeArray(T) binNode<T> *
+
+template <class T>
+class binNode
+{
+public:
+    T data;
+    std::string pos;
+    binNode *parent;
+    binNode *lc;
+    binNode *rc;
+    binNode()
+    {
+        parent = NULL;
+        lc = NULL;
+        rc = NULL;
+    }
+    binNode(binNode *p, binNode *l, binNode *r)
+    {
+        parent = p;
+        lc = l;
+        rc = r;
+    }
+    ~binNode()
+    {
+    }
+
+    bool operator>(binNode const &bn)
+    {
+        return data > bn.data;
+    }
+
+    bool operator<(binNode const &bn)
+    {
+        return data < bn.data;
+    }
+
+        bool operator==(binNode const &bn)
+    {
+        return data == bn.data;
+    }
+};
+#endif
\ No newline at end of file
diff --git a/ex9/bintree.h b/ex9/bintree.h
new file mode 100644
index 0000000..bfa99b3
--- /dev/null
+++ b/ex9/bintree.h
@@ -0,0 +1,9 @@
+//bintree宏定义
+
+#include "binnode.hpp"
+
+#define isRoot(x) (!(x->parent))
+#define isLC(x) (!isRoot(x)&&((x)==(x->parent->lc))
+#define isRC(x) (!isRoot(x)&&((x)==(x->parent->rc))
+#define hasLC(x) (x->lc)
+#define hasRC(x) (x->rc)
\ No newline at end of file
diff --git a/ex9/bintree.hpp b/ex9/bintree.hpp
new file mode 100644
index 0000000..c85dc02
--- /dev/null
+++ b/ex9/bintree.hpp
@@ -0,0 +1,51 @@
+#ifndef _bintree_hpp_
+#define _bintree_hpp_
+#include "binnode.hpp"
+#include "list.hpp"
+#include "queue.hpp"
+template <class T>
+class binTree
+{
+    protected:
+        binNodeArray(T) _root;
+        List<T> plist;
+        int height;
+
+    public:
+        binNodeArray(T) root()
+        {
+            return _root;
+        }
+        binTree()
+        {
+            _root = new binNode<T>;
+        }
+
+        binNodeArray(T) addLC(binNodeArray(T) node,T data)
+        {   if(node->lc)
+                return NULL;
+            
+            binNodeArray(T) temp = new binNode<T>;
+            temp->data = data;
+            node->lc = temp;
+            return temp;
+        }
+
+        binNodeArray(T) addRC(binNodeArray(T) node,T data)
+        {   if(node->rc)
+                return NULL;
+            
+            binNodeArray(T) temp = new binNode<T>;
+            temp->data = data;
+            node->rc = temp;
+            return temp;
+        }
+        void trav_level()
+        {
+
+        }
+};
+
+#endif
+
+#include "bintree.h"
\ No newline at end of file
diff --git a/ex9/ex9.cpp b/ex9/ex9.cpp
new file mode 100644
index 0000000..c18608f
--- /dev/null
+++ b/ex9/ex9.cpp
@@ -0,0 +1,12 @@
+#include <iostream>
+#include "BST.hpp"
+
+int main()
+{
+    printf("初始化\n");
+    BST bst(31);
+    printf("层次遍历\n");
+    bst.trav_level();
+
+    return 0;
+}
\ No newline at end of file
diff --git a/ex9/list.hpp b/ex9/list.hpp
new file mode 100644
index 0000000..0966c4a
--- /dev/null
+++ b/ex9/list.hpp
@@ -0,0 +1,123 @@
+#ifndef _LIST_HPP_
+#define _LIST_HPP_
+#include <iostream>
+#include <string>
+#define listNode ln *
+
+template <class T>
+class List
+{
+    typedef struct ln
+    {
+        T data;
+        listNode pred;
+        listNode succ;
+    } ln;
+
+private:
+    listNode header = new ln;
+    listNode trailer = new ln;
+    int _size;
+
+protected:
+    listNode firstInsertN(listNode New);
+    listNode lastInsertN(listNode New);
+    listNode succInsertN(listNode old, listNode ne);
+    listNode predInsertN(listNode old, listNode ne);
+    void removeN(listNode i);
+    listNode searchN(int value, int n, listNode p);
+
+public:
+    int size(){return _size;}
+    List();
+    void clear();
+    listNode first() { return header->succ; }
+    listNode last() { return trailer->pred; }
+    T firstInsert(T New);
+    T lastInsert(T New);
+    T removeLast();
+    listNode succInsert(listNode Old, T New);
+    listNode predInsert(listNode Old, T New);
+
+    int get(int i);
+    listNode find(int i);
+
+    T operator[](int i)
+    {
+        listNode p = first();
+        while (0 < i--)
+            p = p->succ;
+        return p->data;
+    }
+
+    protected:
+    T remove(listNode p);
+};
+
+template <class T>
+List<T>::List()
+{
+    _size = 0;
+    header->data = 0;
+    header->succ = trailer;
+    header->pred = NULL;
+
+    trailer->data = 0;
+    trailer->succ = NULL;
+    trailer->pred = header;
+}
+
+template <class T>
+void List<T>::clear()
+{
+    while (0 < _size)
+        remove(0);
+}
+
+template <class T>
+T List<T>::firstInsert(T New)
+{
+    listNode temp = new ln;
+    temp->data = New;
+    temp->pred = header;
+    temp->succ = header->succ;
+    header->succ = temp;
+    temp->succ->pred = temp;
+    _size++;
+    return New;
+}
+template <class T>
+T List<T>::lastInsert(T New)
+{
+    listNode temp = new ln;
+    temp->data = New;
+    temp->succ = trailer;
+    temp->pred = trailer->pred;
+    trailer->pred = temp;
+    temp->pred->succ = temp;
+    _size++;
+    return New;
+}
+
+template <class T>
+T List<T>::removeLast()
+{
+    return remove(trailer->pred);
+}
+
+template <class T>
+T List<T>::remove(listNode p)
+{
+    if (!_size)
+        return NULL;
+
+    T temp = p->data;
+    (p->pred)->succ = p->succ;
+    (p->succ)->pred = p->pred;
+    delete[] p;
+    _size--;
+
+    return temp;
+}
+
+#endif
\ No newline at end of file
diff --git a/ex9/queue.hpp b/ex9/queue.hpp
new file mode 100644
index 0000000..2234165
--- /dev/null
+++ b/ex9/queue.hpp
@@ -0,0 +1,45 @@
+#ifndef _QUEUE_HPP_
+#define _QUEUE_HPP_
+
+#include <iostream>
+#include "list.hpp"
+template <class T>
+class Queue
+{
+private:
+    List<T> q;
+public:
+
+    T operator[](int i)
+    {
+        return q[i];
+    }
+
+    int size()
+    {
+        return q.size();
+    }
+    bool empty()
+    {
+        return size() ? false : true;
+    }
+    T enqueue(T e)
+    {
+        return q.firstInsert(e);
+    }
+    T dequeue()
+    {
+        return q.removeLast();
+    }
+    T front()
+    {
+        return q.last()->data;
+    }
+
+    T back()
+    {
+        return q.first()->data;
+    }
+
+};
+#endif
\ No newline at end of file
diff --git a/ex9/stack.hpp b/ex9/stack.hpp
new file mode 100644
index 0000000..f49d067
--- /dev/null
+++ b/ex9/stack.hpp
@@ -0,0 +1,64 @@
+#ifndef _STACK_HPP_
+#define _STACK_HPP_
+#include <iostream>
+
+
+template <class T>
+class Stack
+{
+private:
+  T *_v;
+  int _len = 10;
+  int _used = 0;
+
+public:
+  Stack()
+  {
+    _v = new T[_len];
+  }
+
+  void push(T const &elem)
+  {
+    _v[_used++] = elem;
+    expand();
+  }
+
+  T pop() { return !_used ? NULL : _v[--_used]; }
+
+  T top() const { return !_used ? NULL : _v[_used - 1]; }
+
+  bool empty() { return _used ? false : true; }
+
+  int depth() { return _used; };
+
+protected:
+  void expand()
+  {
+    if (((double)_used / (double)_len) <= 0.75)
+      return;
+    _len = _len * 2;
+    T *p = new T[_len];
+
+    for (int i = 0; i <= _used; i++)
+      p[i] = _v[i];
+
+    delete[] _v;
+    _v = p;
+  }
+
+  void shrink()
+  {
+    if (((double)_used / (double)_len) >= 0.25)
+      return;
+
+    _len = _len >> 1;
+    T *p = new T[_len];
+
+    for (int i = 0; i <= _used; i++)
+      p[i] = _v[i];
+
+    delete[] _v;
+    _v = p;
+  }
+};
+#endif
\ No newline at end of file
diff --git a/ex9/vector.hpp b/ex9/vector.hpp
new file mode 100644
index 0000000..8f24532
--- /dev/null
+++ b/ex9/vector.hpp
@@ -0,0 +1,119 @@
+#ifndef _VECTOR_HPP_
+#define _VECTOR_HPP_
+
+#include <iostream>
+
+template <class T>
+class Vector
+{
+private:
+  T *_v;
+  int _len;
+  int _used;
+  bool _sorted = false;
+
+  void expand();
+  void shrink();
+  void adjust();
+
+public:
+
+  Vector(int len)
+  {
+    _used = 0;
+    _len = len;
+    _v = new int[_len];
+  }
+  Vector()
+  {
+    _used = 0;
+    _len = 10;
+    _v = new int[_len];
+  }
+
+  T get(int a){return _v[a];}
+  T operator[](int i){return _v[i];}
+
+  //排序搜索，返回秩
+  int search(T value);
+  
+  void put(int a, int value);
+
+  void swap(int a, int b);
+
+  int insert(int locate, int value);
+
+  int remove(int locate, int value);
+
+  int remove_sorted(int value);
+
+  int find(int value);
+
+  void bubbleSort();
+
+  void printall();
+
+  int getlen();
+
+  int getused();
+
+  int count(int value);
+
+  void mergeSort(int lo, int hi);
+
+private:
+  void merge(int lo, int mi, int hi);
+};
+
+
+
+
+template <class T>
+void Vector<T>::expand()
+{
+  _len = _len * 2;
+  T *p = new T[_len];
+
+  for (int i = 0; i <= _used; i++)
+    p[i] = _v[i];
+
+  delete[] _v;
+  _v = p;
+}
+template <class T>
+void Vector<T>::shrink()
+{
+  _len = _len >> 1;
+  T *p = new T[_len];
+
+  for (int i = 0; i <= _used; i++)
+    p[i] = _v[i];
+
+  delete[] _v;
+  _v = p;
+}
+template <class T>
+void Vector<T>::adjust()
+{
+  if (((double)_used / (double)_len) < 0.25)
+    shrink();
+  else if (((double)_used / (double)_len) > 0.75)
+    expand();
+  return;
+}
+
+
+template <class T>
+int Vector<T>::search(T e)
+{
+    if (_sorted == false)
+        return -1;
+
+    int i = 0;
+    for (; i <= _used && _v[i] <= e; i++)
+        ;
+
+    return i - 1;
+}
+
+#endif
\ No newline at end of file