diff --git a/src/main/scala/practise1/comprehensive/Comprehensive.scala b/src/main/scala/practise1/comprehensive/Comprehensive.scala
index 1887a75..be16e8a 100644
--- a/src/main/scala/practise1/comprehensive/Comprehensive.scala
+++ b/src/main/scala/practise1/comprehensive/Comprehensive.scala
@@ -19,16 +19,16 @@ object Comprehensive {
     val score = 85
 
     val evaluate =
-      if (score >= 90 ) "优秀"
-    else if (score >= 80) "良好"
-    else if (score >= 60) "及格"
-    else "不及格"
+      if (score >= 90) "优秀"
+      else if (score >= 80) "良好"
+      else if (score >= 60) "及格"
+      else "不及格"
 
     println(
       s"""
-        |${name}，今年${age}岁
-        |成绩：${score}
-        |评价:${evaluate}""".stripMargin)
+         |${name}，今年${age}岁
+         |成绩：${score}
+         |评价:${evaluate}""".stripMargin)
   }
 
 }
diff --git a/src/main/scala/practise1/demo/Demo1VarAndVal.scala b/src/main/scala/practise1/demo/Demo1VarAndVal.scala
index 20f5dbe..3f3ad2f 100644
--- a/src/main/scala/practise1/demo/Demo1VarAndVal.scala
+++ b/src/main/scala/practise1/demo/Demo1VarAndVal.scala
@@ -8,14 +8,13 @@ object Demo1VarAndVal {
     // name = "Tom"    // ❌ 不允许修改
 
     var age = 25
-    age = 26           // ✅ 可以修改
+    age = 26 // ✅ 可以修改
     println(name)
     println(age)
 
     println("=================================")
 
 
-
     println("=================================")
   }
 
diff --git a/src/main/scala/practise1/demo/Demo2Type.scala b/src/main/scala/practise1/demo/Demo2Type.scala
index c81edd8..73bcd15 100644
--- a/src/main/scala/practise1/demo/Demo2Type.scala
+++ b/src/main/scala/practise1/demo/Demo2Type.scala
@@ -6,10 +6,10 @@ object Demo2Type {
     //
     //Scala 支持自动推断类型：
 
-    val name = "xiaoMing"   // String
-    val age = 25           // Int
-    val price = 19.99      // Double
-    val flag = true        // Boolean
+    val name = "xiaoMing" // String
+    val age = 25 // Int
+    val price = 19.99 // Double
+    val flag = true // Boolean
 
     // 也可以明确指定：
     val name2: String = "xiaoMing"
diff --git a/src/main/scala/practise1/demo/Demo3StringInterpolation.scala b/src/main/scala/practise1/demo/Demo3StringInterpolation.scala
index dfc5900..c6fa2f7 100644
--- a/src/main/scala/practise1/demo/Demo3StringInterpolation.scala
+++ b/src/main/scala/practise1/demo/Demo3StringInterpolation.scala
@@ -1,5 +1,6 @@
 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 0372ebd..fc732d9 100644
--- a/src/main/scala/practise1/demo/Demo4If.scala
+++ b/src/main/scala/practise1/demo/Demo4If.scala
@@ -6,18 +6,18 @@ object Demo4If {
     // Scala 的 if 和 Java 类似
     val age = 20
 
-    if(age >=18){
+    if (age >= 18) {
       println("成年人")
-    }else{
+    } else {
       println("未成年")
     }
 
     // 但是 Scala 有一个非常重要的特点：if 本身就是一个表达式，可以返回值
 
 
-    val result = if(age >= 18){
+    val result = if (age >= 18) {
       "成年人"
-    }else{
+    } else {
       "未成年人"
     }
 
diff --git a/src/main/scala/practise1/exercises/Exercises1.scala b/src/main/scala/practise1/exercises/Exercises1.scala
index a710485..b3a771a 100644
--- a/src/main/scala/practise1/exercises/Exercises1.scala
+++ b/src/main/scala/practise1/exercises/Exercises1.scala
@@ -2,15 +2,15 @@ package practise1.exercises
 
 object Exercises1 {
   def main(args: Array[String]): Unit = {
-/*    练习 1：基本变量
+    /*    练习 1：基本变量
 
-    创建三个变量：
-    name = "Tom"
-    age = 20
-    salary = 15000.5
+        创建三个变量：
+        name = "Tom"
+        age = 20
+        salary = 15000.5
 
-    要求：
-    输出：Tom今年20岁，工资是15000.5*/
+        要求：
+        输出：Tom今年20岁，工资是15000.5*/
 
     val name = "Tom"
     val age = 20
diff --git a/src/main/scala/practise1/exercises/Exercises2.scala b/src/main/scala/practise1/exercises/Exercises2.scala
index 98a4e59..e34dede 100644
--- a/src/main/scala/practise1/exercises/Exercises2.scala
+++ b/src/main/scala/practise1/exercises/Exercises2.scala
@@ -1,5 +1,6 @@
 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 85f4cfb..1095106 100644
--- a/src/main/scala/practise1/exercises/Exercises3.scala
+++ b/src/main/scala/practise1/exercises/Exercises3.scala
@@ -1,5 +1,6 @@
 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 96d3482..d6a19c9 100644
--- a/src/main/scala/practise1/exercises/Exercises4.scala
+++ b/src/main/scala/practise1/exercises/Exercises4.scala
@@ -1,5 +1,6 @@
 package practise1.exercises
 
+
 import scala.util.Random
 
 object Exercises4 {