From f8479c818821d1d01496cb298cdd0dc877a62feb Mon Sep 17 00:00:00 2001
From: sbkebcmj <1129528239@qq.com>
Date: Wed, 4 Nov 2020 23:45:16 +0800
Subject: [PATCH] Update 12.5.md (#777)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

修复示例打开文件未关闭错误
---
 eBook/12.5.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/eBook/12.5.md b/eBook/12.5.md
index 020cc6e..88b0a07 100644
--- a/eBook/12.5.md
+++ b/eBook/12.5.md
@@ -40,6 +40,7 @@ func main() {
 			continue
 		}
 		cat(bufio.NewReader(f))
+		f.Close()
 	}
 }
 ```