diff --git "a/\345\274\240\346\241\202\345\234\206/2022-0222 \342\201\256\345\212\240\345\207\217\344\271\230\351\231\244/demo01.js" "b/\345\274\240\346\241\202\345\234\206/2022-0222 \342\201\256\345\212\240\345\207\217\344\271\230\351\231\244/demo01.js"
new file mode 100644
index 0000000000000000000000000000000000000000..68e923d7a3d71a405572de5f9b6072aad3603e50
--- /dev/null
+++ "b/\345\274\240\346\241\202\345\234\206/2022-0222 \342\201\256\345\212\240\345\207\217\344\271\230\351\231\244/demo01.js"	
@@ -0,0 +1,50 @@
+//加
+// function add(a,b){
+//     let num = a+b;
+//     let num2 = Math.floor(num*100)/100;//向下取整
+//     return num2
+// }
+// //减
+// function subtract(a,b){
+//     let num = a-b;
+//     let num2 = Math.floor(num*100)/100
+//     return num2
+// }
+// //乘
+// function mul(a,b){
+//     let num = a*b;
+//     let num2 = Math.floor(num*100)/100
+//     return num2
+// }
+// //除
+// function divide(a,b){
+//     let num = a/b;
+//     let num2 = Math.floor(num*100)/100;
+//     return num2
+// }
+
+let count = {
+    add:function(num1,num2){
+        num3= num1+num2;
+        return num3;
+    },
+    subtract:function(num1,num2){
+        num3= num1-num2;
+        return num3;
+    },
+    mul:function(num1,num2){
+        num3= num1*num2;
+        return num3;
+    },
+    divide:function(num1,num2){
+        num3= num1/num2;
+        return num3;
+    },
+}
+function handele(num1,num2,symbol){
+    if(isNaN(num1)||isNaN(num2)){
+        throw new  Error('请输入数字')
+    }
+    return count[symbol](num1,num2)
+}
+module.exports.handele=handele
diff --git "a/\345\274\240\346\241\202\345\234\206/2022-0222 \342\201\256\345\212\240\345\207\217\344\271\230\351\231\244/demo02.js" "b/\345\274\240\346\241\202\345\234\206/2022-0222 \342\201\256\345\212\240\345\207\217\344\271\230\351\231\244/demo02.js"
new file mode 100644
index 0000000000000000000000000000000000000000..2317d3c38ecb5f431712fd00ffd05f9ae4b519eb
--- /dev/null
+++ "b/\345\274\240\346\241\202\345\234\206/2022-0222 \342\201\256\345\212\240\345\207\217\344\271\230\351\231\244/demo02.js"	
@@ -0,0 +1,9 @@
+const text = require('./demo01.js')
+try{
+    console.log("加:"+text.handele('5','5','add'));
+    console.log('减:'+text.handele('5','5','subtract'));
+    console.log('乘:'+text.handele('5','5','mul'));
+    console.log('除:'+text.handele('5','5','divide'));
+}catch{
+    console.log(Error.massage);
+}
\ No newline at end of file
diff --git "a/\345\274\240\346\241\202\345\234\206/2022-0224 fs\345\220\214\346\255\245\345\206\231\345\205\245\346\226\207\344\273\266/write.js" "b/\345\274\240\346\241\202\345\234\206/2022-0224 fs\345\220\214\346\255\245\345\206\231\345\205\245\346\226\207\344\273\266/write.js"
new file mode 100644
index 0000000000000000000000000000000000000000..44c0d3c3ced009d8f45e0dc7580ac14e234bffd2
--- /dev/null
+++ "b/\345\274\240\346\241\202\345\234\206/2022-0224 fs\345\220\214\346\255\245\345\206\231\345\205\245\346\226\207\344\273\266/write.js"	
@@ -0,0 +1,39 @@
+let fs = require('fs')
+let createFile = {
+    //创建文件夹
+    createPath: function (dir) {
+        if (fs.existsSync(dir)) {
+            throw new Error('该文件已存在!')
+        }
+        fs.mkdirSync(dir)
+    },
+    //创建文件内容
+    createContent: function () {
+        let arr = ["太阳光大、父母恩大、君子量大、小人气大", "成功是优点的发挥，失败是缺点的累积", "不要小看自己，因为人有无限的可能",
+            "口说好话、心想好意、身行好事", "原谅别人就是善待自己", "手心向下是助人，手心向上是求人；助人快乐，求人痛苦"];
+        let index = Math.floor((Math.random() * arr.length))
+        let conent = arr[index];
+        return conent;
+    },
+    //写入文件内容
+    createFile: function (filePath, content) {
+        console.log(filePath);
+        let fd = fs.openSync(filePath, 'w');
+        fs.writeSync(fd, content);
+        fs.closeSync(fd);
+    },
+    //处理函数
+    handle: function (num, dir) {
+        this.createPath(dir);
+        for (let i = 1; i < num; i++) {
+            let filename = dir + '/' + i + '.txt'
+            let content = this.createContent(i)
+            this.createFile(filename, content)
+        }
+    }
+}
+try{
+    createFile.handle(10, 'a');
+}catch(error){
+    console.log(error.message);
+}
\ No newline at end of file