diff --git "a/\346\234\261\347\276\216\346\236\227/20220222_lesson01 \346\250\241\345\235\227\345\214\226\345\256\236\347\216\260\345\212\240\345\207\217\344\271\230\351\231\244/calculate.js" "b/\346\234\261\347\276\216\346\236\227/20220222_lesson01 \346\250\241\345\235\227\345\214\226\345\256\236\347\216\260\345\212\240\345\207\217\344\271\230\351\231\244/calculate.js"
new file mode 100644
index 0000000000000000000000000000000000000000..6e5bb1f4a2e709131bd8afbfa1f0e8833628ce19
--- /dev/null
+++ "b/\346\234\261\347\276\216\346\236\227/20220222_lesson01 \346\250\241\345\235\227\345\214\226\345\256\236\347\216\260\345\212\240\345\207\217\344\271\230\351\231\244/calculate.js"	
@@ -0,0 +1,23 @@
+module.exports =
+    function add(x, y) {
+    return parseInt(x) + parseInt(y);
+}
+
+function subtract(x, y) {
+    return parseInt(x) - parseInt(y)
+
+}
+
+ function multiply(x, y) {
+    return parseInt(x) * parseInt(y)
+
+}
+
+ function divide(x, y) {
+    return parseInt(x) / parseInt(y)
+}
+
+
+
+
+
diff --git "a/\346\234\261\347\276\216\346\236\227/20220222_lesson01 \346\250\241\345\235\227\345\214\226\345\256\236\347\216\260\345\212\240\345\207\217\344\271\230\351\231\244/module_count.js" "b/\346\234\261\347\276\216\346\236\227/20220222_lesson01 \346\250\241\345\235\227\345\214\226\345\256\236\347\216\260\345\212\240\345\207\217\344\271\230\351\231\244/module_count.js"
new file mode 100644
index 0000000000000000000000000000000000000000..dedc8458bfdecd9a97c501b085113f85298ff1fd
--- /dev/null
+++ "b/\346\234\261\347\276\216\346\236\227/20220222_lesson01 \346\250\241\345\235\227\345\214\226\345\256\236\347\216\260\345\212\240\345\207\217\344\271\230\351\231\244/module_count.js"	
@@ -0,0 +1,21 @@
+var count = {
+    add: function add(x, y) {
+        return x + y;
+    },
+    subtract: function subtract(x, y) {
+        return x - y;
+    },
+    multiply:function multiply(x, y) {
+        return x * y;
+    },
+    divide:function divide(x, y) {
+        return x / y;
+    }
+}
+function handle(x, y, symbol) {
+    if (isNaN(x) || isNaN(y)) {
+        throw Error("请输入数值");
+    }
+    return count[symbol](x, y);
+}
+module.exports.handle = handle;
\ No newline at end of file
diff --git "a/\346\234\261\347\276\216\346\236\227/20220222_lesson01 \346\250\241\345\235\227\345\214\226\345\256\236\347\216\260\345\212\240\345\207\217\344\271\230\351\231\244/test.js" "b/\346\234\261\347\276\216\346\236\227/20220222_lesson01 \346\250\241\345\235\227\345\214\226\345\256\236\347\216\260\345\212\240\345\207\217\344\271\230\351\231\244/test.js"
new file mode 100644
index 0000000000000000000000000000000000000000..ebe571650de50e5f8901a91328aa163b0338ec03
--- /dev/null
+++ "b/\346\234\261\347\276\216\346\236\227/20220222_lesson01 \346\250\241\345\235\227\345\214\226\345\256\236\347\216\260\345\212\240\345\207\217\344\271\230\351\231\244/test.js"	
@@ -0,0 +1,12 @@
+let cal=require('./calculate');
+let add=(8+9);
+console.log(add);
+
+let subtract=(8-9);
+console.log(subtract);
+
+let multiply=(2*9);
+console.log(multiply);
+
+let divide=(18/2);
+console.log(divide);
diff --git "a/\346\234\261\347\276\216\346\236\227/20220222_lesson01 \346\250\241\345\235\227\345\214\226\345\256\236\347\216\260\345\212\240\345\207\217\344\271\230\351\231\244/test1.js" "b/\346\234\261\347\276\216\346\236\227/20220222_lesson01 \346\250\241\345\235\227\345\214\226\345\256\236\347\216\260\345\212\240\345\207\217\344\271\230\351\231\244/test1.js"
new file mode 100644
index 0000000000000000000000000000000000000000..9781fbc5685d5bc8a03212d86ed4d77be6693415
--- /dev/null
+++ "b/\346\234\261\347\276\216\346\236\227/20220222_lesson01 \346\250\241\345\235\227\345\214\226\345\256\236\347\216\260\345\212\240\345\207\217\344\271\230\351\231\244/test1.js"	
@@ -0,0 +1,9 @@
+let count = require('./module_count');
+try {
+    console.log(count.handle(9, 3, 'add'));
+    console.log(count.handle(6, 3, 'subtract'));
+    console.log(count.handle(3, 2, 'multiply'));
+    console.log(count.handle(20, 4, 'divide'));
+} catch (error) {
+    console.log(error.message);
+}
\ No newline at end of file
diff --git "a/\346\234\261\347\276\216\346\236\227/20220224 fs\345\220\214\346\255\245\345\206\231\345\205\245\346\226\207\344\273\266/fileplay.js" "b/\346\234\261\347\276\216\346\236\227/20220224 fs\345\220\214\346\255\245\345\206\231\345\205\245\346\226\207\344\273\266/fileplay.js"
new file mode 100644
index 0000000000000000000000000000000000000000..f9d649220507609dcce35434be11341ab52fae0c
--- /dev/null
+++ "b/\346\234\261\347\276\216\346\236\227/20220224 fs\345\220\214\346\255\245\345\206\231\345\205\245\346\226\207\344\273\266/fileplay.js"	
@@ -0,0 +1,17 @@
+//作业,写一段代码,可以指定的创建多个文件，文件名中要有序号，写入的内容可以随机
+let fs=require("fs")
+let fd=[]
+function create(num){
+    if (isNaN(num)) {
+        throw new Error("请输入数字")
+    } else {
+        for (let i = 1; i < num; i++) {
+            fd[i] = fs.openSync(`${i}.txt`, "w");
+            fs.writeSync(fd[i], `${Math.random()}`);
+            fs.closeSync(fd[i])
+        }
+    }
+}
+module.exports={
+    create:create
+}
\ No newline at end of file
diff --git "a/\346\234\261\347\276\216\346\236\227/20220224 fs\345\220\214\346\255\245\345\206\231\345\205\245\346\226\207\344\273\266/writefile.js" "b/\346\234\261\347\276\216\346\236\227/20220224 fs\345\220\214\346\255\245\345\206\231\345\205\245\346\226\207\344\273\266/writefile.js"
new file mode 100644
index 0000000000000000000000000000000000000000..b5ac5e9b5fbe51365f7bc442cf64e9181846075e
--- /dev/null
+++ "b/\346\234\261\347\276\216\346\236\227/20220224 fs\345\220\214\346\255\245\345\206\231\345\205\245\346\226\207\344\273\266/writefile.js"	
@@ -0,0 +1,7 @@
+//调用fs.js
+let cre=require("./fileplay");
+try{
+    cre.create(6)
+}catch(error){
+    console.log(error.message);
+}
\ No newline at end of file