diff --git "a/\351\237\246\347\273\215\344\270\245/\346\250\241\345\235\227-23.02.15/index.js" "b/\351\237\246\347\273\215\344\270\245/\346\250\241\345\235\227-23.02.15/index.js"
new file mode 100644
index 0000000000000000000000000000000000000000..fd32dfddeab12d75d44f47af73292c20319342bd
--- /dev/null
+++ "b/\351\237\246\347\273\215\344\270\245/\346\250\241\345\235\227-23.02.15/index.js"
@@ -0,0 +1,35 @@
+module.exports={
+    add:function(a,b){
+        if(typeof(a)=="number" && typeof(b)=="number"){
+            return a+b;
+        }else{
+            return "非数值"
+        }
+    },
+    sub:function(a,b){
+        if(typeof(a)=="number" && typeof(b)=="number"){
+            return a-b;
+        }else{
+            return "非数值"
+        }
+    },
+    mul:function(a,b){
+        if(typeof(a)=="number" && typeof(b)=="number"){
+            return a*b;
+        }else{
+            return "非数值"
+        }
+    },
+    div:function(a,b){
+        if(typeof(a)=="number" && typeof(b)=="number"){
+            if(b==0){
+                return "除数不能为0"
+            }else{
+                return a/b;
+            }
+            
+        }else{
+            return "非数值"
+        }
+    }
+}
\ No newline at end of file
diff --git "a/\351\237\246\347\273\215\344\270\245/\346\250\241\345\235\227-23.02.15/use.js" "b/\351\237\246\347\273\215\344\270\245/\346\250\241\345\235\227-23.02.15/use.js"
new file mode 100644
index 0000000000000000000000000000000000000000..c93774a348201bbd628d007050bb1c9310819fd8
--- /dev/null
+++ "b/\351\237\246\347\273\215\344\270\245/\346\250\241\345\235\227-23.02.15/use.js"
@@ -0,0 +1,5 @@
+let use = require("./index.js")
+console.log(use.add(0,2));
+console.log(use.sub('p',2));
+console.log(use.mul(2,2));
+console.log(use.div(2,0));
\ No newline at end of file
diff --git "a/\351\237\246\347\273\215\344\270\245/\351\237\246\347\273\215\344\270\245.txt" "b/\351\237\246\347\273\215\344\270\245/\351\237\246\347\273\215\344\270\245.txt"
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391