diff --git "a/\351\231\210\350\223\223/0218\344\275\234\344\270\232/index.js" "b/\351\231\210\350\223\223/0218\344\275\234\344\270\232/index.js"
new file mode 100644
index 0000000000000000000000000000000000000000..c7e6bf07557714b9720c73de6dec1cdd3c8d4285
--- /dev/null
+++ "b/\351\231\210\350\223\223/0218\344\275\234\344\270\232/index.js"
@@ -0,0 +1,22 @@
+//生成10000个文件，用同步、异步分别生成文件的时间
+//同步
+let fs = require('fs');
+let numberFile = 10000;
+var t1,t2;
+for (var i = 1; i <=numberFile; i++) {
+ //   console.log("正在创建/写入第"+i+"个文件");
+    fs.writeFileSync('./index'+i+'.txt','wenjian',function (err) {
+        console.log(err);
+    });
+    if(i==1){
+         t1 = new Date().getTime();
+        console.log(t1);
+    }
+    if (i==numberFile) {
+         t2 = new Date().getTime();
+        console.log(t2); 
+    }
+}
+
+console.log((t2-t1)+"毫秒");
+
diff --git "a/\351\231\210\350\223\223/index.js" "b/\351\231\210\350\223\223/index.js"
new file mode 100644
index 0000000000000000000000000000000000000000..f6f9e84e94a8cc61741e6db796209972f6889dad
--- /dev/null
+++ "b/\351\231\210\350\223\223/index.js"
@@ -0,0 +1,26 @@
+let fs = require("fs");
+
+for(var i=1;i<=100;i++){
+    const number = Math.floor(Math.random() * 1000) + 1;
+    console.log("准备写入"+i+"个文件");
+  fs.writeFileSync('input'+i+'.txt',''+number+'', function(err) {
+   if (err) {
+       return console.error(err);
+   }
+   
+});
+}
+console.log("-----------------------------------")
+let arr = [];
+for(var i=1;i<=100;i++){
+  console.log("读取写入的数据！");
+ arr[i] =fs.readFileSync('input'+i+'.txt',function(err,data) {
+  if (err) {
+      return console.error(err);
+  }
+}).toString();
+}
+console.log(arr);
+const max = arr.reduce((a, b) => Math.max(a, b));
+const min = arr.reduce((a, b) => Math.min(a, b));
+console.log(max,min);
diff --git "a/\351\231\210\350\223\223/\346\250\241\345\235\227-\345\212\240\345\207\217\344\271\230\351\231\244/add.js" "b/\351\231\210\350\223\223/\346\250\241\345\235\227-\345\212\240\345\207\217\344\271\230\351\231\244/add.js"
new file mode 100644
index 0000000000000000000000000000000000000000..efafe2881a9f042ae677bf2f662479c56759924f
--- /dev/null
+++ "b/\351\231\210\350\223\223/\346\250\241\345\235\227-\345\212\240\345\207\217\344\271\230\351\231\244/add.js"
@@ -0,0 +1,26 @@
+
+let obj ={
+    add:function (a,b) {
+    // console.log(a+b);
+        return a+b; 
+    },
+// add(10,5);
+// console.log(add(10,5));
+    ride:function (a,b) {
+        return a*b;
+    },
+    chu:function (a,b) {
+        if(a == 0){
+            return '该算式错误！';
+        }else{
+            return a/b;
+        }
+    },
+    jian:function (a,b) {
+        return a-b;
+    }
+}
+module.exports = obj;
+// module.exports.add= add;
+// module.exports.ride = ride;
+// module.exports.chu = chu;
diff --git "a/\351\231\210\350\223\223/\346\250\241\345\235\227-\345\212\240\345\207\217\344\271\230\351\231\244/use.js" "b/\351\231\210\350\223\223/\346\250\241\345\235\227-\345\212\240\345\207\217\344\271\230\351\231\244/use.js"
new file mode 100644
index 0000000000000000000000000000000000000000..ae87bedf37405d8b7965e13e20a11e85b6818fe8
--- /dev/null
+++ "b/\351\231\210\350\223\223/\346\250\241\345\235\227-\345\212\240\345\207\217\344\271\230\351\231\244/use.js"
@@ -0,0 +1,8 @@
+let obj = require("./add");
+// let a = 10;
+// let b = 5;
+console.log(obj.add(10,9));
+console.log(obj.ride(10,9));
+console.log(obj.chu(0,1));
+console.log(obj.jian(0,9));
+