diff --git a/classroom/classroom.c b/classroom/classroom.c
index 1fd8fa5..02fabfa 100644
--- a/classroom/classroom.c
+++ b/classroom/classroom.c
@@ -17,4 +17,9 @@ void cs_find_classroom()  // 2020-8-20
 void set_classroom()
 {
 	
+}
+
+void classroom_add 20200824()
+{
+	
 }
\ No newline at end of file