From 4db90555a750cf8e361afd37fc09697ae2c0fa84 Mon Sep 17 00:00:00 2001
From: KawaiiAsh <kawaiiashsama@gmail.com>
Date: Tue, 21 Jan 2025 06:29:09 -0500
Subject: [PATCH] Update binary_tree.md (#1618)

* Update binary_tree.md

* Update binary_tree.md

Thank you for the fix!

---------

Co-authored-by: Yudong Jin <krahets@163.com>
---
 docs/chapter_tree/binary_tree.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/docs/chapter_tree/binary_tree.md b/docs/chapter_tree/binary_tree.md
index f83ebee37..f13bfcb55 100644
--- a/docs/chapter_tree/binary_tree.md
+++ b/docs/chapter_tree/binary_tree.md
@@ -493,6 +493,8 @@
     P->left = n2;
     // 删除节点 P
     n1->left = n2;
+    // 释放内存
+    delete P;
     ```
 
 === "Java"
@@ -598,6 +600,8 @@
     P->left = n2;
     // 删除节点 P
     n1->left = n2;
+    // 释放内存
+    free(P);
     ```
 
 === "Kotlin"