From 9cb8cbeee6d6cd99fb22820dfd677d2537997f56 Mon Sep 17 00:00:00 2001
From: Eureka1024 <1072348750@qq.com>
Date: Fri, 30 Apr 2021 17:18:33 +0800
Subject: [PATCH] =?UTF-8?q?=E3=80=90=E6=9B=B4=E6=96=B0=E6=96=87=E6=A1=A3?=
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---
 .../rt-thread-standard/tutorial/beep-player/pin.md            | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/rt-thread-version/rt-thread-standard/tutorial/beep-player/pin.md b/rt-thread-version/rt-thread-standard/tutorial/beep-player/pin.md
index 62c1b03..79b779c 100644
--- a/rt-thread-version/rt-thread-standard/tutorial/beep-player/pin.md
+++ b/rt-thread-version/rt-thread-standard/tutorial/beep-player/pin.md
@@ -127,7 +127,7 @@ int led_off(void)
 int led_toggle(void);        //LED 灯亮灭状态翻转
 ```
 
-要使 LED 状态翻转应先利用API  `rt_pin_read` 读出当前电平，然后输出相反电平 
+要使 LED 状态翻转应先利用API  `rt_pin_read` 读出当前电平，然后输出相反电平。
 
 ```c
 int led_toggle(void)
@@ -158,6 +158,8 @@ int main(void)
         led_toggle();
         rt_thread_mdelay(500);
     }
+
+    return 0;
 }
 ```
 
-- 
Gitee