diff --git a/ex/exercise0/src/App.js b/ex/exercise0/src/App.js
index d7499f097..ad8e8cd33 100644
--- a/ex/exercise0/src/App.js
+++ b/ex/exercise0/src/App.js
@@ -1,5 +1,5 @@
 import React from 'react'
-import Swiper from './components/index'
+import Swiper from './components/hoc'
 import './components/app.css'
 class App extends React.Component{
   constructor(){
diff --git a/ex/exercise0/src/components/hoc.js b/ex/exercise0/src/components/hoc.js
index 818b484ff..42d0f2e09 100644
--- a/ex/exercise0/src/components/hoc.js
+++ b/ex/exercise0/src/components/hoc.js
@@ -1,3 +1,9 @@
+/*
+ * @Author: chenxuan
+ * @Date: 2021-11-21 15:55:15
+ * @LastEditTime: 2021-11-21 22:55:37
+ * @LastEditors: chenxuan
+ */
 import React from 'react';
 function Hoc(WithComponent){
     return class HocComponent extends React.Component{
@@ -54,7 +60,7 @@ function Hoc(WithComponent){
             this.Data=this.props.data;
             if(this.Data && this.Data.length>0 && this.isInit){
                 for(let i=0;i<this.Data.length;i++){
-                    if(i==1){
+                    if(i===1){
                         this.Data[i].active=true;
                     }
                     else {
diff --git a/ex/exercise0/src/components/index.js b/ex/exercise0/src/components/index.js
index b64410ff4..35eff9880 100644
--- a/ex/exercise0/src/components/index.js
+++ b/ex/exercise0/src/components/index.js
@@ -1,3 +1,9 @@
+/*
+ * @Author: chenxuan
+ * @Date: 2021-11-21 15:55:15
+ * @LastEditTime: 2021-11-21 22:54:16
+ * @LastEditors: chenxuan
+ */
 import React from 'react'
 import Hoc from './hoc';
 import './style.css'
diff --git a/ex/exercise2/src/components/hehe/index.js b/ex/exercise2/src/components/hehe/index.js
deleted file mode 100644
index e69de29bb..000000000
diff --git a/ex/exercise2/src/components/swiper/index.js b/ex/exercise2/src/components/swiper/index.js
index 9be2f39e3..21c79753c 100644
--- a/ex/exercise2/src/components/swiper/index.js
+++ b/ex/exercise2/src/components/swiper/index.js
@@ -1,3 +1,9 @@
+/*
+ * @Author: chenxuan
+ * @Date: 2021-11-21 15:55:15
+ * @LastEditTime: 2021-11-21 22:57:24
+ * @LastEditors: chenxuan
+ */
 import React from 'react'
 import './style.css'
 export default class Swiper extends React.Component{