1 files changed, 10 insertions, 0 deletions
diff --git a/examples/libc/printf.c b/examples/libc/printf.c
index 85e33671d6..c7968b9a0b 100644
--- a/examples/libc/printf.c
+++ b/examples/libc/printf.c
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2010-11-17     Bernard      first version
+ */
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/fcntl.h>