diff --git "a/\344\274\215\346\231\272\350\276\211/buffer\344\275\234\344\270\232/Demo01.js" "b/\344\274\215\346\231\272\350\276\211/buffer\344\275\234\344\270\232/Demo01.js"
new file mode 100644
index 0000000000000000000000000000000000000000..62f30c12806acb523e664e72c9c23431a62e87f7
--- /dev/null
+++ "b/\344\274\215\346\231\272\350\276\211/buffer\344\275\234\344\270\232/Demo01.js"
@@ -0,0 +1,13 @@
+// 写一段代码,可以指定的创业多个文件，文件名中要有序号，写入的内容可以随机
+let fs = require('fs');
+
+for(let i = 1;i <= 9;i++){
+    let fd = fs.openSync(`第${i}个文件`,`w`);//以读取模式打开文件，如果文件不存在则创建
+    //异步写入
+    fs.writeSync(fd,`哈哈哈${i+1}`,function(err){
+        if(err){
+            throw err;
+        }
+    });
+fs.closeSync(fd);
+}
\ No newline at end of file
diff --git "a/\344\274\215\346\231\272\350\276\211/\345\210\233\345\273\272100\344\270\252.txt" "b/\344\274\215\346\231\272\350\276\211/\345\210\233\345\273\272100\344\270\252.txt"
new file mode 100644
index 0000000000000000000000000000000000000000..26edc689423554b00246ee479b138bbf096e3707
--- /dev/null
+++ "b/\344\274\215\346\231\272\350\276\211/\345\210\233\345\273\272100\344\270\252.txt"
@@ -0,0 +1,21 @@
+let fs = require('fs')
+
+function readfire(){
+
+    for(let i=1,aa=0; i<=100; i++)
+    {
+        let fd = fs.openSync(`./login${i}.txt`,'w')
+        fs.writeSync(fd,`${i}个`)
+
+        let buffer=fs.readFileSync(`./login${i}.txt`,{flag:'r',encoding:'utf8'});
+            let num = buffer.toString()
+            // console.log(num);
+            aa += num;
+            
+            
+        if(i==99)
+            console.log(aa);
+            fs.closeSync(fd)
+    }
+}
+readfire()
\ No newline at end of file
diff --git "a/\344\274\215\346\231\272\350\276\211/\346\250\241\345\235\227\345\214\226\344\275\234\344\270\232/Demo01.js" "b/\344\274\215\346\231\272\350\276\211/\346\250\241\345\235\227\345\214\226\344\275\234\344\270\232/Demo01.js"
new file mode 100644
index 0000000000000000000000000000000000000000..62db7a7568417904cb57e43afce8c05e9121a748
--- /dev/null
+++ "b/\344\274\215\346\231\272\350\276\211/\346\250\241\345\235\227\345\214\226\344\275\234\344\270\232/Demo01.js"
@@ -0,0 +1,21 @@
+var count ={
+    add:function(num1,num2){
+        return num1 + num2;
+    },
+    subtract:function(num1,num2){
+        return num1 - num2;
+    },
+    ride:function(num1,num2){
+        return num1 * num2;
+    },
+    divide:function(num1,num2){
+        return num1 / num2;
+    }
+}
+function handle(num1,num2,symbol){
+    if(isNaN(num1)||isNaN(num2)){
+        throw Error("输入错误,请输入数字！");
+    }
+    return count[symbol](num1,num2)
+}
+module.exports = handle;
\ No newline at end of file
diff --git "a/\344\274\215\346\231\272\350\276\211/\346\250\241\345\235\227\345\214\226\344\275\234\344\270\232/Demo02.js" "b/\344\274\215\346\231\272\350\276\211/\346\250\241\345\235\227\345\214\226\344\275\234\344\270\232/Demo02.js"
new file mode 100644
index 0000000000000000000000000000000000000000..02aa7fce3cd755688055205530902028a9e96903
--- /dev/null
+++ "b/\344\274\215\346\231\272\350\276\211/\346\250\241\345\235\227\345\214\226\344\275\234\344\270\232/Demo02.js"
@@ -0,0 +1,3 @@
+let Demo01 = require('./Demo01');
+
+console.log( Demo01(1,2,'add'));
\ No newline at end of file