diff --git "a/\346\233\276\346\273\241/\345\206\205\345\256\271.txt" "b/\346\233\276\346\273\241/\345\206\205\345\256\271.txt"
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git "a/\346\233\276\346\273\241/\347\254\254\344\270\200\346\254\241\344\275\234\344\270\232/moudle.js" "b/\346\233\276\346\273\241/\347\254\254\344\270\200\346\254\241\344\275\234\344\270\232/moudle.js"
new file mode 100644
index 0000000000000000000000000000000000000000..7a2d38227b4af67d8c6043b3429fb35a9712ea01
--- /dev/null
+++ "b/\346\233\276\346\273\241/\347\254\254\344\270\200\346\254\241\344\275\234\344\270\232/moudle.js"
@@ -0,0 +1,56 @@
+module.exports={
+    //加
+      add: function (a,b)   {
+        if(this.error(a,b)){
+            console.log('加法');
+            return a+b;
+        }else{
+            console.log('加法输入错误');
+        }
+        
+    },
+    //减
+    subtract: function (a,b){
+        if(this.error(a,b)){
+            console.log('减法');
+            return a-b;
+        }else{
+            console.log('减法输入错误');
+        }
+       
+    },
+
+    //乘
+    multiply: function (a,b){
+        if(this.error(a,b)){
+            console.log('乘法');
+            return a*b;
+        }else{
+            console.log('乘法输入错误');
+        }
+      
+    },
+
+    //除
+    divide: function (a,b){
+        if(this.error(a,b)){
+
+            if(b==0){
+                console.log('除数为0，错误')
+            }
+            console.log('除法');
+            return a/b;
+        }else{
+            console.log('除法输入错误');
+        }
+        
+    },
+    error: (a, b) => {
+        if (isNaN(a) == true || isNaN(b) == true) {
+            return false;
+        } else {
+            return true;
+        }
+    }
+
+}
\ No newline at end of file
diff --git "a/\346\233\276\346\273\241/\347\254\254\344\270\200\346\254\241\344\275\234\344\270\232/use.js" "b/\346\233\276\346\273\241/\347\254\254\344\270\200\346\254\241\344\275\234\344\270\232/use.js"
new file mode 100644
index 0000000000000000000000000000000000000000..9d7d25284c85d1741b5f2fe31a6126f1104f19d5
--- /dev/null
+++ "b/\346\233\276\346\273\241/\347\254\254\344\270\200\346\254\241\344\275\234\344\270\232/use.js"
@@ -0,0 +1,18 @@
+// const { add } = require("./moudle.js");
+// console.log(add(5,5));
+// const { subtract } = require("./moudle.js");
+// console.log(subtract(13,4));
+// const { multiply } = require("./moudle.js");
+// console.log(multiply(2,4));
+// const { divide } = require("./moudle.js");
+// console.log(divide(10,10));
+
+var obj= require("./moudle.js");
+
+console.log(obj.add(5,5));
+
+console.log(obj.subtract(13,4));
+
+console.log(obj.multiply(2,4));
+
+console.log(obj.divide(10,0));
\ No newline at end of file