diff --git "a/\345\274\240\351\224\264 (2)/2.21homework/calculate.js" "b/\345\274\240\351\224\264 (2)/2.21homework/calculate.js"
new file mode 100644
index 0000000000000000000000000000000000000000..0695869dcb85c36a290127c1a58af4f87bf190bd
--- /dev/null
+++ "b/\345\274\240\351\224\264 (2)/2.21homework/calculate.js"	
@@ -0,0 +1,19 @@
+module.exports.calculate = {
+    add:function(a,b){
+        if( !isNaN( a ) | !isNaN( b ) )
+        {
+         return console.log(a+b)
+        }else{
+            console.log("数据类型错误？")
+        }
+    },
+    del:function(a,b){
+        return console.log(a-b)
+    },
+    cf:function(a,b){
+        return  console.log(a*b)
+    },
+    chf:function(a,b){
+        return  console.log(a/b)
+    }
+}
\ No newline at end of file
diff --git "a/\345\274\240\351\224\264 (2)/2.21homework/demo.js" "b/\345\274\240\351\224\264 (2)/2.21homework/demo.js"
new file mode 100644
index 0000000000000000000000000000000000000000..cddcd8db18a6c8ef66d04fb67601a5a1acd0327f
--- /dev/null
+++ "b/\345\274\240\351\224\264 (2)/2.21homework/demo.js"	
@@ -0,0 +1,3 @@
+let cal = require("./calculate.js");
+console.log(cal.calculate.add("zhagnkai",5));
+console.log(cal.calculate.del(10,10));
diff --git "a/\345\274\240\351\224\264 (2)/2.21homework/text.js" "b/\345\274\240\351\224\264 (2)/2.21homework/text.js"
new file mode 100644
index 0000000000000000000000000000000000000000..0d820a88343daa927a197bba3d3d4a8c7f76371b
--- /dev/null
+++ "b/\345\274\240\351\224\264 (2)/2.21homework/text.js"	
@@ -0,0 +1,7 @@
+let num = 5
+console.log(isNaN(num)) ;
+if( !isNaN( num ) )
+   {
+    alert('是数字');
+    return false;
+   }
diff --git "a/\345\274\240\351\224\264 (2)/2.21homework/workspace.code-workspace" "b/\345\274\240\351\224\264 (2)/2.21homework/workspace.code-workspace"
new file mode 100644
index 0000000000000000000000000000000000000000..baa8bf2dffc1f1aa2760fa7e0f262d9ea39d979a
--- /dev/null
+++ "b/\345\274\240\351\224\264 (2)/2.21homework/workspace.code-workspace"	
@@ -0,0 +1,11 @@
+{
+	"folders": [
+		{
+			"path": "..\\..\\11.13"
+		},
+		{
+			"path": "."
+		}
+	],
+	"settings": {}
+}
\ No newline at end of file
diff --git "a/\345\274\240\351\224\264 (2)/2.23homework/import.js" "b/\345\274\240\351\224\264 (2)/2.23homework/import.js"
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git "a/\345\274\240\351\224\264 (2)/2.23homework/\344\274\230\345\214\226demo.js" "b/\345\274\240\351\224\264 (2)/2.23homework/\344\274\230\345\214\226demo.js"
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git "a/\345\274\240\351\224\264 (2)/2.24homewor/1\345\217\267\346\226\207\344\273\266" "b/\345\274\240\351\224\264 (2)/2.24homewor/1\345\217\267\346\226\207\344\273\266"
new file mode 100644
index 0000000000000000000000000000000000000000..9eacd6c173b44ad60e00e6d1fae8ddde455161c8
--- /dev/null
+++ "b/\345\274\240\351\224\264 (2)/2.24homewor/1\345\217\267\346\226\207\344\273\266"	
@@ -0,0 +1 @@
+我的包
\ No newline at end of file
diff --git "a/\345\274\240\351\224\264 (2)/2.24homewor/2\345\217\267\346\226\207\344\273\266" "b/\345\274\240\351\224\264 (2)/2.24homewor/2\345\217\267\346\226\207\344\273\266"
new file mode 100644
index 0000000000000000000000000000000000000000..9eacd6c173b44ad60e00e6d1fae8ddde455161c8
--- /dev/null
+++ "b/\345\274\240\351\224\264 (2)/2.24homewor/2\345\217\267\346\226\207\344\273\266"	
@@ -0,0 +1 @@
+我的包
\ No newline at end of file
diff --git "a/\345\274\240\351\224\264 (2)/2.24homewor/3\345\217\267\346\226\207\344\273\266" "b/\345\274\240\351\224\264 (2)/2.24homewor/3\345\217\267\346\226\207\344\273\266"
new file mode 100644
index 0000000000000000000000000000000000000000..9eacd6c173b44ad60e00e6d1fae8ddde455161c8
--- /dev/null
+++ "b/\345\274\240\351\224\264 (2)/2.24homewor/3\345\217\267\346\226\207\344\273\266"	
@@ -0,0 +1 @@
+我的包
\ No newline at end of file
diff --git "a/\345\274\240\351\224\264 (2)/2.24homewor/4\345\217\267\346\226\207\344\273\266" "b/\345\274\240\351\224\264 (2)/2.24homewor/4\345\217\267\346\226\207\344\273\266"
new file mode 100644
index 0000000000000000000000000000000000000000..9eacd6c173b44ad60e00e6d1fae8ddde455161c8
--- /dev/null
+++ "b/\345\274\240\351\224\264 (2)/2.24homewor/4\345\217\267\346\226\207\344\273\266"	
@@ -0,0 +1 @@
+我的包
\ No newline at end of file
diff --git "a/\345\274\240\351\224\264 (2)/2.24homewor/5\345\217\267\346\226\207\344\273\266" "b/\345\274\240\351\224\264 (2)/2.24homewor/5\345\217\267\346\226\207\344\273\266"
new file mode 100644
index 0000000000000000000000000000000000000000..9eacd6c173b44ad60e00e6d1fae8ddde455161c8
--- /dev/null
+++ "b/\345\274\240\351\224\264 (2)/2.24homewor/5\345\217\267\346\226\207\344\273\266"	
@@ -0,0 +1 @@
+我的包
\ No newline at end of file
diff --git "a/\345\274\240\351\224\264 (2)/2.24homewor/aboutfs.js" "b/\345\274\240\351\224\264 (2)/2.24homewor/aboutfs.js"
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git "a/\345\274\240\351\224\264 (2)/2.24homewor/fs.js" "b/\345\274\240\351\224\264 (2)/2.24homewor/fs.js"
new file mode 100644
index 0000000000000000000000000000000000000000..f041b4304a2a4219e04859267560de6c20a5cdaf
--- /dev/null
+++ "b/\345\274\240\351\224\264 (2)/2.24homewor/fs.js"	
@@ -0,0 +1,17 @@
+let fs = require("fs");
+
+
+
+for(let i = 1 ;i<=5;i++){
+
+let fd = fs.openSync(`${i}号文件`,'w');
+
+fs.writeSync(fd,"我的yanyan",function(err){
+    if(err){
+        throw err ;
+    }
+});
+
+fs.closeSync(fd)
+
+}
\ No newline at end of file
diff --git "a/\345\274\240\351\224\264 (2)/2.24homewor/\345\217\267\346\265\213\350\257\225\346\226\207\344\273\266.txt" "b/\345\274\240\351\224\264 (2)/2.24homewor/\345\217\267\346\265\213\350\257\225\346\226\207\344\273\266.txt"
new file mode 100644
index 0000000000000000000000000000000000000000..9eacd6c173b44ad60e00e6d1fae8ddde455161c8
--- /dev/null
+++ "b/\345\274\240\351\224\264 (2)/2.24homewor/\345\217\267\346\265\213\350\257\225\346\226\207\344\273\266.txt"	
@@ -0,0 +1 @@
+我的包
\ No newline at end of file
diff --git "a/\345\274\240\351\224\264 (2)/2.24homewor/\345\274\202\345\270\270\346\234\272\345\210\266.js" "b/\345\274\240\351\224\264 (2)/2.24homewor/\345\274\202\345\270\270\346\234\272\345\210\266.js"
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391