diff --git a/docs/notes/01_c-basic/07_xdx/index.md b/docs/notes/01_c-basic/07_xdx/index.md
index e79fc57..a636c66 100644
--- a/docs/notes/01_c-basic/07_xdx/index.md
+++ b/docs/notes/01_c-basic/07_xdx/index.md
@@ -254,8 +254,6 @@ int main() {
 
 
 
-
-
 # 第二章：printf 函数