diff --git "a/\346\236\227\346\230\261/\345\220\214\346\255\245\345\206\231\345\205\245/${i}.txt" "b/\346\236\227\346\230\261/\345\220\214\346\255\245\345\206\231\345\205\245/${i}.txt"
new file mode 100644
index 0000000000000000000000000000000000000000..c0a13336da83aedb79f232c59688066db15b10bf
--- /dev/null
+++ "b/\346\236\227\346\230\261/\345\220\214\346\255\245\345\206\231\345\205\245/${i}.txt"
@@ -0,0 +1 @@
+${Math.random()}
\ No newline at end of file
diff --git "a/\346\236\227\346\230\261/\345\220\214\346\255\245\345\206\231\345\205\245/fileplay.js" "b/\346\236\227\346\230\261/\345\220\214\346\255\245\345\206\231\345\205\245/fileplay.js"
new file mode 100644
index 0000000000000000000000000000000000000000..6f42258aadbae8e3ca2a1dcee036108198dcb09c
--- /dev/null
+++ "b/\346\236\227\346\230\261/\345\220\214\346\255\245\345\206\231\345\205\245/fileplay.js"
@@ -0,0 +1,16 @@
+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\236\227\346\230\261/\345\220\214\346\255\245\345\206\231\345\205\245/writefile.js" "b/\346\236\227\346\230\261/\345\220\214\346\255\245\345\206\231\345\205\245/writefile.js"
new file mode 100644
index 0000000000000000000000000000000000000000..d62799f33721e9e6d4d69358ba860fab79f7e397
--- /dev/null
+++ "b/\346\236\227\346\230\261/\345\220\214\346\255\245\345\206\231\345\205\245/writefile.js"
@@ -0,0 +1,6 @@
+let cre =require("./fileplay");
+try{
+    cre.create(6)
+}catch(error){
+    console.log(error.message);
+}
\ No newline at end of file
diff --git "a/\346\236\227\346\230\261/\345\233\233\345\210\231\350\277\220\347\256\227/calculate.js" "b/\346\236\227\346\230\261/\345\233\233\345\210\231\350\277\220\347\256\227/calculate.js"
new file mode 100644
index 0000000000000000000000000000000000000000..677bde54ee2785a37d542b137cd094f5a4206e73
--- /dev/null
+++ "b/\346\236\227\346\230\261/\345\233\233\345\210\231\350\277\220\347\256\227/calculate.js"
@@ -0,0 +1,12 @@
+let cal=require('./demo01');
+let add=(6+3);
+console.log(add);
+
+let substract=(9-5);
+console.log(substract);
+
+let multiply=(3*6);
+console.log(multiply);
+
+let divide=(8/4);
+console.log(divide);
\ No newline at end of file
diff --git "a/\346\236\227\346\230\261/\345\233\233\345\210\231\350\277\220\347\256\227/calculate2.js" "b/\346\236\227\346\230\261/\345\233\233\345\210\231\350\277\220\347\256\227/calculate2.js"
new file mode 100644
index 0000000000000000000000000000000000000000..c3c4028b104353e1c659cd77d2d5e670ac3da2ae
--- /dev/null
+++ "b/\346\236\227\346\230\261/\345\233\233\345\210\231\350\277\220\347\256\227/calculate2.js"
@@ -0,0 +1,9 @@
+let count=require('./demo02');
+try{
+    console.log(count.handle(11,66,'add'));
+    console.log(count.handle(33,11,'subtract'));
+    console.log(count.handle(24,3,'multiply'));
+    console.log(count.handle(99,3,'divide'));
+}catch(error){
+    console.log(error.message);
+}
\ No newline at end of file
diff --git "a/\346\236\227\346\230\261/\345\233\233\345\210\231\350\277\220\347\256\227/demo01.js" "b/\346\236\227\346\230\261/\345\233\233\345\210\231\350\277\220\347\256\227/demo01.js"
new file mode 100644
index 0000000000000000000000000000000000000000..0788efd912009add6d9bcfb094aa468b5240921e
--- /dev/null
+++ "b/\346\236\227\346\230\261/\345\233\233\345\210\231\350\277\220\347\256\227/demo01.js"
@@ -0,0 +1,14 @@
+module.exports =
+    function add(x, y) {
+        return parseInt(x) + parseInt(y);
+    }
+
+function substract(x, y) {
+    return parseInt(x) - parseInt(y);
+}
+function mutiply(x, y) {
+    return parseInt(x) * parseInt(y);
+}
+function divide(x, y) {
+    return parseInt(x) / parseInt(y);
+}
\ No newline at end of file
diff --git "a/\346\236\227\346\230\261/\345\233\233\345\210\231\350\277\220\347\256\227/demo02.js" "b/\346\236\227\346\230\261/\345\233\233\345\210\231\350\277\220\347\256\227/demo02.js"
new file mode 100644
index 0000000000000000000000000000000000000000..89c63c2d420e06ddaa735e0bdf542affb35eb851
--- /dev/null
+++ "b/\346\236\227\346\230\261/\345\233\233\345\210\231\350\277\220\347\256\227/demo02.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("请输入数字");
+    }
+    return count[symbol](x,y);
+}
+module.exports.handle = handle;
\ No newline at end of file