diff --git a/src/main/scala/practise2/exercises/Exercises2.scala b/src/main/scala/practise2/exercises/Exercises2.scala
index 40a3e63..bd8eddc 100644
--- a/src/main/scala/practise2/exercises/Exercises2.scala
+++ b/src/main/scala/practise2/exercises/Exercises2.scala
@@ -1,4 +1,5 @@
 package practise2.exercises
+
 /*
 练习 2：计算平方
 
@@ -17,5 +18,6 @@ object Exercises2 {
   def main(args: Array[String]): Unit = {
     print(square(5))
   }
+
   def square(x: Int): Int = x * x
 }