diff --git a/src/main/scala/practise1/comprehensive/Comprehensive.scala b/src/main/scala/practise1/comprehensive/Comprehensive.scala
index be16e8a..a41e3f5 100644
--- a/src/main/scala/practise1/comprehensive/Comprehensive.scala
+++ b/src/main/scala/practise1/comprehensive/Comprehensive.scala
@@ -1,5 +1,6 @@
 package practise1.comprehensive
 
+
 object Comprehensive {
   def main(args: Array[String]): Unit = {
     /*第 1 课综合题
diff --git a/src/main/scala/practise1/demo/Demo1VarAndVal.scala b/src/main/scala/practise1/demo/Demo1VarAndVal.scala
index 3f3ad2f..e4d7cb4 100644
--- a/src/main/scala/practise1/demo/Demo1VarAndVal.scala
+++ b/src/main/scala/practise1/demo/Demo1VarAndVal.scala
@@ -1,5 +1,6 @@
 package practise1.demo
 
+
 object Demo1VarAndVal {
   def main(args: Array[String]): Unit = {
 
diff --git a/src/main/scala/practise1/demo/Demo2Type.scala b/src/main/scala/practise1/demo/Demo2Type.scala
index 73bcd15..99723d9 100644
--- a/src/main/scala/practise1/demo/Demo2Type.scala
+++ b/src/main/scala/practise1/demo/Demo2Type.scala
@@ -1,5 +1,6 @@
 package practise1.demo
 
+
 object Demo2Type {
   def main(args: Array[String]): Unit = {
     //2. 类型
diff --git a/src/main/scala/practise1/demo/Demo3StringInterpolation.scala b/src/main/scala/practise1/demo/Demo3StringInterpolation.scala
index c6fa2f7..dfc5900 100644
--- a/src/main/scala/practise1/demo/Demo3StringInterpolation.scala
+++ b/src/main/scala/practise1/demo/Demo3StringInterpolation.scala
@@ -1,6 +1,5 @@
 package practise1.demo
 
-
 object Demo3StringInterpolation {
 
   // 这是 Scala 很常用的语法：
diff --git a/src/main/scala/practise1/demo/Demo4If.scala b/src/main/scala/practise1/demo/Demo4If.scala
index fc732d9..cfd5e3c 100644
--- a/src/main/scala/practise1/demo/Demo4If.scala
+++ b/src/main/scala/practise1/demo/Demo4If.scala
@@ -1,5 +1,4 @@
 package practise1.demo
-
 object Demo4If {
   def main(args: Array[String]): Unit = {
 
diff --git a/src/main/scala/practise1/exercises/Exercises1.scala b/src/main/scala/practise1/exercises/Exercises1.scala
index b3a771a..b871e66 100644
--- a/src/main/scala/practise1/exercises/Exercises1.scala
+++ b/src/main/scala/practise1/exercises/Exercises1.scala
@@ -16,6 +16,7 @@ object Exercises1 {
     val age = 20
     val salary = 15000.5
 
+
     println(s"${name}今年${age}岁，工资是${salary}")
   }
 }
diff --git a/src/main/scala/practise1/exercises/Exercises2.scala b/src/main/scala/practise1/exercises/Exercises2.scala
index e34dede..98a4e59 100644
--- a/src/main/scala/practise1/exercises/Exercises2.scala
+++ b/src/main/scala/practise1/exercises/Exercises2.scala
@@ -1,6 +1,5 @@
 package practise1.exercises
 
-
 object Exercises2 {
   def main(args: Array[String]): Unit = {
     /*    练习 2：判断年龄
diff --git a/src/main/scala/practise1/exercises/Exercises3.scala b/src/main/scala/practise1/exercises/Exercises3.scala
index 1095106..85f4cfb 100644
--- a/src/main/scala/practise1/exercises/Exercises3.scala
+++ b/src/main/scala/practise1/exercises/Exercises3.scala
@@ -1,6 +1,5 @@
 package practise1.exercises
 
-
 object Exercises3 {
   def main(args: Array[String]): Unit = {
     /*    练习 3：计算两个数
diff --git a/src/main/scala/practise1/exercises/Exercises4.scala b/src/main/scala/practise1/exercises/Exercises4.scala
index d6a19c9..9f166e7 100644
--- a/src/main/scala/practise1/exercises/Exercises4.scala
+++ b/src/main/scala/practise1/exercises/Exercises4.scala
@@ -1,6 +1,4 @@
 package practise1.exercises
-
-
 import scala.util.Random
 
 object Exercises4 {