diff --git a/miniprogram-3/app.js b/miniprogram-3/app.js
new file mode 100644
index 0000000000000000000000000000000000000000..d773a34e4fb45d62583f98d2d8b663a80ec95af9
--- /dev/null
+++ b/miniprogram-3/app.js
@@ -0,0 +1,10 @@
+// app.js
+App({
+  onLaunch() {
+    // 展示本地存储能力
+    
+  },
+  globalData: {
+    userInfo: null
+  }
+})
diff --git a/miniprogram-3/app.json b/miniprogram-3/app.json
new file mode 100644
index 0000000000000000000000000000000000000000..289c48907c7ca48e09050515d249be87cdbe3270
--- /dev/null
+++ b/miniprogram-3/app.json
@@ -0,0 +1,13 @@
+{
+  "pages":[
+    "pages/add/add"
+  ],
+  "window":{
+    "backgroundTextStyle":"light",
+    "navigationBarBackgroundColor": "#fff",
+    "navigationBarTitleText": "计算器",
+    "navigationBarTextStyle":"black"
+  },
+  "style": "v2",
+  "sitemapLocation": "sitemap.json"
+}
diff --git a/miniprogram-3/app.wxss b/miniprogram-3/app.wxss
new file mode 100644
index 0000000000000000000000000000000000000000..06c6fc9ce35b7d02e031b1e8f4636147321dedc1
--- /dev/null
+++ b/miniprogram-3/app.wxss
@@ -0,0 +1,10 @@
+/**app.wxss**/
+.container {
+  height: 100%;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: space-between;
+  padding: 200rpx 0;
+  box-sizing: border-box;
+} 
diff --git a/miniprogram-3/pages/add/add.js b/miniprogram-3/pages/add/add.js
new file mode 100644
index 0000000000000000000000000000000000000000..b0868f7a4c7f1fc1601ff15b2ee5c862f348550e
--- /dev/null
+++ b/miniprogram-3/pages/add/add.js
@@ -0,0 +1,193 @@
+// pages/add/add.js
+Page({
+
+  /**
+   * 页面的初始数据
+   */
+  data: {
+    input:'',//输入字符串
+    outcome:'',//输出结果
+    button:[
+      {class:'style-one',tap:'taptwo',id:'sin'},
+      {class:'style-one',tap:'taptwo',id:'cos'},
+      {class:'style-one',tap:'taptwo',id:'tan'},
+      {class:'style-one',tap:'taptwo',id:'lg'},
+      {class:'style-one',tap:'taptwo',id:'ln'},
+      {class:'style-one',tap:'taptwo',id:'e'},
+      {class:'style-one',tap:'taptwo',id:'√'},
+      {class:'style-two',tap:'clear',id:'C'},
+      {class:'style-one',tap:'taptwo',id:'7'},
+      {class:'style-one',tap:'taptwo',id:'4'},
+      {class:'style-one',tap:'taptwo',id:'1'},
+      {class:'style-one',tap:'taptwo',id:'%'},
+      {class:'style-one',tap:'tapthree',id:'x^'},
+      {class:'style-two',tap:'taptwo',id:'÷'},
+      {class:'style-one',tap:'taptwo',id:'8'},
+      {class:'style-one',tap:'taptwo',id:'5'},
+      {class:'style-one',tap:'taptwo',id:'2'},
+      {class:'style-one',tap:'taptwo',id:'0'},
+      {class:'style-one',tap:'tapthree',id:'x²'},
+      {class:'style-two',tap:'taptwo',id:'×'},
+      {class:'style-one',tap:'taptwo',id:'9'},
+      {class:'style-one',tap:'taptwo',id:'6'},
+      {class:'style-one',tap:'taptwo',id:'3'},
+      {class:'style-one',tap:'taptwo',id:'.'},
+      {class:'style-one',tap:'taptwo',id:'Π'},
+      {class:'style-two',tap:'delete',id:'<<'},
+      {class:'style-two',tap:'taptwo',id:'-'},
+      {class:'style-two',tap:'taptwo',id:'+'},
+      {class:'style-three',tap:'finish',id:'='}
+    ]
+  },
+  taptwo(e){
+    // 通过id的确定按键并修改字符串
+    this.setData({
+      input:this.data.input+e.currentTarget.dataset.id
+    })
+  },
+  tapthree(e){
+    // 单独处理次方输入
+    var str=e.currentTarget.dataset.id
+    str=str==="x^"?"^":"²"
+    console.log(str);
+    this.setData({
+      input:this.data.input+str
+    })
+  },
+  clear(){
+    // 清空字符串
+    this.setData({
+      input:''
+    })
+  },
+  delete(){
+    // 后退一格
+    var str=this.data.input
+    str=str.substring(0,str.length-1)
+    this.setData({
+      input:str
+    })
+  },
+  finish(){
+    // 字符串处理
+    var str=this.data.input
+    if(str.charAt(0)=="-"&&str.charAt(1)=="-"){
+      str=str.substring(2,)
+    }
+    str=str.replace(/(\d+)+\%/g,function(a,b){
+      return Number(b)*0.01
+    }).replace(/e/g,"2.7182818285").replace(/Π/g,"3.1415926535")
+    str=str.replace(/√+((\d+\.\d+)|(\d+))/g,function(a,b){
+      return Math.sqrt(Number(b))
+    }).replace(/((\d+\.\d+)|(\d+))+²/g,function(a,b){
+      return Math.pow(Number(b),2)
+    })
+    str=str.replace(/((\d+\.\d+)|(\d+))+\^(\d+)/g,function(a,b,c,d,e){
+      console.log(a,b,c,d,e);
+      return Math.pow(Number(d),Number(e))
+    })
+    str=str.replace(/ln+((\d+\.\d+)|(\d+))/g,function(a,b){
+      return Math.log(Number(b))
+    }).replace(/lg+((\d+\.\d+)|(\d+))/g,function(a,b){
+      return Math.log10(Number(b))
+    })
+    str=str.replace(/sin+((\d+\.\d+)|(\d+))/g,function(a,b){
+      return Math.sin(Number(b))
+    }).replace(/cos+((\d+\.\d+)|(\d+))/g,function(a,b){
+      return Math.cos(Number(b))
+    }).replace(/tan+((\d+\.\d+)|(\d+))/g,function(a,b){
+      return Math.tan(Number(b))
+    })
+// 处理乘除加减
+    while(str.indexOf("\×")!=-1){
+      //var out=str  
+      str=str.replace(/((\d+\.\d+)|(\d+))+×+((\d+\.\d+)|(\d+))/,function(a,b,c,d,e){
+        return Number(d)*Number(e)
+      })
+      //if(out===str) break
+    }
+    while(str.indexOf("\÷")!=-1){ 
+      str=str.replace(/((\d+\.\d+)|(\d+))+÷+((\d+\.\d+)|(\d+))/,function(a,b,c,d,e){
+        return Number(d)/Number(e)
+      })
+    }
+    while(1){
+      var out=str
+      str=str.replace(/((\d+\.\d+)|(\d+))+((\+)|(\-))+((\d+\.\d+)|(\d+))/,function(a,b,c,d,e,f,g,h){
+        if(str.indexOf("\-")!=0){
+          if(e=="-"){
+            return Number(d)-Number(h)}
+          else{
+            return Number(d)+Number(h)}
+        }else{
+          if(e=="-"){
+            return Number(d)+Number(h)}
+          else{
+            return Number(d)-Number(h)}
+        }
+      })
+      if(str.charAt(0)=="-"&&str.charAt(1)=="-"){
+        str=str.substring(2,)
+      }
+      if(out===str) break
+    }
+    this.setData({
+      outcome:str
+    })
+  },
+  /**
+   * 生命周期函数--监听页面加载
+   */
+  onLoad: function (options) {
+
+  },
+
+  /**
+   * 生命周期函数--监听页面初次渲染完成
+   */
+  onReady: function () {
+
+  },
+
+  /**
+   * 生命周期函数--监听页面显示
+   */
+  onShow: function () {
+
+  },
+
+  /**
+   * 生命周期函数--监听页面隐藏
+   */
+  onHide: function () {
+
+  },
+
+  /**
+   * 生命周期函数--监听页面卸载
+   */
+  onUnload: function () {
+
+  },
+
+  /**
+   * 页面相关事件处理函数--监听用户下拉动作
+   */
+  onPullDownRefresh: function () {
+
+  },
+
+  /**
+   * 页面上拉触底事件的处理函数
+   */
+  onReachBottom: function () {
+
+  },
+
+  /**
+   * 用户点击右上角分享
+   */
+  onShareAppMessage: function () {
+
+  }
+})
\ No newline at end of file
diff --git a/miniprogram-3/pages/add/add.json b/miniprogram-3/pages/add/add.json
new file mode 100644
index 0000000000000000000000000000000000000000..8835af0699ccec004cbe685ef938cd2d63ea7037
--- /dev/null
+++ b/miniprogram-3/pages/add/add.json
@@ -0,0 +1,3 @@
+{
+  "usingComponents": {}
+}
\ No newline at end of file
diff --git a/miniprogram-3/pages/add/add.wxml b/miniprogram-3/pages/add/add.wxml
new file mode 100644
index 0000000000000000000000000000000000000000..aae5dc30479bad574332c22e300f44e86a23bd43
--- /dev/null
+++ b/miniprogram-3/pages/add/add.wxml
@@ -0,0 +1,13 @@
+<!--pages/add/add.wxml-->
+<view class="show">
+<!-- 显示->输入、输出 -->
+  <view class="input">{{input}}</view>
+  <view class="outcome" >{{outcome}}</view>
+</view>
+<view class="button">
+  <block wx:for="{{button}}">
+    <view class="button-block">
+      <view class="{{item.class}}" data-id="{{item.id}}" bindtap="{{item.tap}}">{{item.id}}</view>
+    </view>
+  </block>
+</view>
diff --git a/miniprogram-3/pages/add/add.wxss b/miniprogram-3/pages/add/add.wxss
new file mode 100644
index 0000000000000000000000000000000000000000..982b53cb09d8badc9d540f9430179de5b9a3e5b7
--- /dev/null
+++ b/miniprogram-3/pages/add/add.wxss
@@ -0,0 +1,74 @@
+/* pages/add/add.wxss */
+page{
+  width: 100%;
+  height: 100%;
+  display: flex;
+  flex-direction: column;
+  font-size: 48rpx;
+}
+.show{
+  width: 100%;
+  height: 33%;
+  background-color: rgb(245,245,245);
+  font-size: 60rpx;
+  font-weight: lighter;
+}
+.input{
+  width: 98%;
+  height: 50%;
+  margin-left: 2%;
+}
+.outcome{
+  width: 98%;
+  height: 48%;
+  display: flex;
+  align-items: flex-end;
+  justify-content: flex-end;
+  margin: 1%;
+}
+.button{
+  width: 100%;
+  height: 67%;
+  display: flex;
+  flex-direction: column;
+  flex-wrap: wrap;
+  white-space: wrap;
+}
+.button-block{
+  width: 20%;
+  height: 16.6%;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+.button-block:last-child{
+  height: 33.2%;
+}
+.style-one{
+  width: 17vw;
+  height: 17vw;
+  background-color: rgb(245,245,245);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  border-radius: 9px;
+}
+.style-two{
+  width: 17vw;
+  height: 17vw;
+  background-color: rgb(233,240,255);
+  color: rgb(82,121,239);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  border-radius: 9px;
+}
+.style-three{
+  width: 17vw;
+  height: 34vw;
+  background-color: rgb(59,131,119);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  border-radius: 9px;
+}
\ No newline at end of file
diff --git a/miniprogram-3/project.config.json b/miniprogram-3/project.config.json
new file mode 100644
index 0000000000000000000000000000000000000000..50c9b4e853f258e76d9a8991246e256bba00d21d
--- /dev/null
+++ b/miniprogram-3/project.config.json
@@ -0,0 +1,68 @@
+{
+  "description": "项目配置文件",
+  "packOptions": {
+    "ignore": []
+  },
+  "setting": {
+    "bundle": false,
+    "userConfirmedBundleSwitch": false,
+    "urlCheck": true,
+    "scopeDataCheck": false,
+    "coverView": true,
+    "es6": true,
+    "postcss": true,
+    "compileHotReLoad": false,
+    "lazyloadPlaceholderEnable": false,
+    "preloadBackgroundData": false,
+    "minified": true,
+    "autoAudits": false,
+    "newFeature": false,
+    "uglifyFileName": false,
+    "uploadWithSourceMap": true,
+    "useIsolateContext": true,
+    "nodeModules": false,
+    "enhance": true,
+    "useMultiFrameRuntime": true,
+    "useApiHook": true,
+    "useApiHostProcess": true,
+    "showShadowRootInWxmlPanel": true,
+    "packNpmManually": false,
+    "enableEngineNative": false,
+    "packNpmRelationList": [],
+    "minifyWXSS": true,
+    "showES6CompileOption": false
+  },
+  "compileType": "miniprogram",
+  "libVersion": "2.20.1",
+  "appid": "wx9c78cf2003a91b56",
+  "projectname": "calculate",
+  "debugOptions": {
+    "hidedInDevtools": []
+  },
+  "scripts": {},
+  "staticServerOptions": {
+    "baseURL": "",
+    "servePath": ""
+  },
+  "isGameTourist": false,
+  "condition": {
+    "search": {
+      "list": []
+    },
+    "conversation": {
+      "list": []
+    },
+    "game": {
+      "list": []
+    },
+    "plugin": {
+      "list": []
+    },
+    "gamePlugin": {
+      "list": []
+    },
+    "miniprogram": {
+      "list": []
+    }
+  }
+}
\ No newline at end of file
diff --git a/miniprogram-3/project.private.config.json b/miniprogram-3/project.private.config.json
new file mode 100644
index 0000000000000000000000000000000000000000..66e668603f00a81a4c3f8fe9da0c07a290c11ab6
--- /dev/null
+++ b/miniprogram-3/project.private.config.json
@@ -0,0 +1,36 @@
+{
+  "setting": {},
+  "condition": {
+    "plugin": {
+      "list": []
+    },
+    "game": {
+      "list": []
+    },
+    "gamePlugin": {
+      "list": []
+    },
+    "miniprogram": {
+      "list": [
+        {
+          "name": "pages/index1/index1",
+          "pathName": "pages/index1/index1",
+          "query": "",
+          "scene": null
+        },
+        {
+          "name": "pages/index/index",
+          "pathName": "pages/index/index",
+          "query": "",
+          "scene": null
+        },
+        {
+          "name": "pages/add/add",
+          "pathName": "pages/add/add",
+          "query": "",
+          "scene": null
+        }
+      ]
+    }
+  }
+}
\ No newline at end of file
diff --git a/miniprogram-3/sitemap.json b/miniprogram-3/sitemap.json
new file mode 100644
index 0000000000000000000000000000000000000000..ca02add20b581be471b8d17f887b8e8337070546
--- /dev/null
+++ b/miniprogram-3/sitemap.json
@@ -0,0 +1,7 @@
+{
+  "desc": "关于本文件的更多信息，请参考文档 https://developers.weixin.qq.com/miniprogram/dev/framework/sitemap.html",
+  "rules": [{
+  "action": "allow",
+  "page": "*"
+  }]
+}
\ No newline at end of file
diff --git a/miniprogram-3/utils/util.js b/miniprogram-3/utils/util.js
new file mode 100644
index 0000000000000000000000000000000000000000..764bc2ce26ab9b55a21cbb069dcf084a8418dffd
--- /dev/null
+++ b/miniprogram-3/utils/util.js
@@ -0,0 +1,19 @@
+const formatTime = date => {
+  const year = date.getFullYear()
+  const month = date.getMonth() + 1
+  const day = date.getDate()
+  const hour = date.getHours()
+  const minute = date.getMinutes()
+  const second = date.getSeconds()
+
+  return `${[year, month, day].map(formatNumber).join('/')} ${[hour, minute, second].map(formatNumber).join(':')}`
+}
+
+const formatNumber = n => {
+  n = n.toString()
+  return n[1] ? n : `0${n}`
+}
+
+module.exports = {
+  formatTime
+}