Update avl_tree.md (krahets#1524)

Syntax for avl trees updated
wanganlin00 · Oct 10, 2024 · 0c60037 · 0c60037
1 parent 5849ae4
commit 0c60037
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/docs/chapter_tree/avl_tree.md b/docs/chapter_tree/avl_tree.md
@@ -180,7 +180,7 @@ AVL 树既是二叉搜索树，也是平衡二叉树，同时满足这两类二
 
     ```c title=""
     /* AVL 树节点结构体 */
-    TreeNode struct TreeNode {
+    typedef struct TreeNode {
         int val;
         int height;
         struct TreeNode *left;