From 4ecf4714c71f2ca6ea3179a161beec76adfc118b Mon Sep 17 00:00:00 2001
From: fw_qaq <82551626+Jack-Zhang-1314@users.noreply.github.com>
Date: Mon, 7 Nov 2022 00:08:02 +0800
Subject: [PATCH] =?UTF-8?q?update=20=E4=BA=8C=E5=8F=89=E6=A0=91=E7=9A=84?=
 =?UTF-8?q?=E8=BF=AD=E4=BB=A3=E9=81=8D=E5=8E=86.md=20about=20rust?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 problems/二叉树的迭代遍历.md | 54 ++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)

diff --git a/problems/二叉树的迭代遍历.md b/problems/二叉树的迭代遍历.md
index a20f11cb..2f67c323 100644
--- a/problems/二叉树的迭代遍历.md
+++ b/problems/二叉树的迭代遍历.md
@@ -640,6 +640,60 @@ object Solution {
   }
 }
 ```
+
+rust:
+
+```rust
+use std::cell::RefCell;
+use std::rc::Rc;
+impl Solution {
+    //前序
+    pub fn preorder_traversal(root: Option<Rc<RefCell<TreeNode>>>) -> Vec<i32> {
+        let mut res = vec![];
+        let mut stack = vec![root];
+        while !stack.is_empty() {
+            if let Some(node) = stack.pop().unwrap() {
+                res.push(node.borrow().val);
+                stack.push(node.borrow().right.clone());
+                stack.push(node.borrow().left.clone());
+            }
+        }
+        res
+    }
+    //中序
+    pub fn inorder_traversal(root: Option<Rc<RefCell<TreeNode>>>) -> Vec<i32> {
+        let mut res = vec![];
+        let mut stack = vec![];
+        let mut node = root;
+
+        while !stack.is_empty() || node.is_some() {
+            while let Some(n) = node {
+                node = n.borrow().left.clone();
+                stack.push(n);
+            }
+            if let Some(n) = stack.pop() {
+                res.push(n.borrow().val);
+                node = n.borrow().right.clone();
+            }
+        }
+        res
+    }
+    //后序
+    pub fn postorder_traversal(root: Option<Rc<RefCell<TreeNode>>>) -> Vec<i32> {
+        let mut res = vec![];
+        let mut stack = vec![root];
+        while !stack.is_empty() {
+            if let Some(node) = stack.pop().unwrap() {
+                res.push(node.borrow().val);
+                stack.push(node.borrow().left.clone());
+                stack.push(node.borrow().right.clone());
+            }
+        }
+        res.into_iter().rev().collect()
+    }
+}
+```
+
 <p align="center">
 <a href="https://programmercarl.com/other/kstar.html" target="_blank">
   <img src="../pics/网站星球宣传海报.jpg" width="1000"/>