diff --git "a/\346\235\250\351\221\253\344\273\252/20230214\344\275\234\344\270\232/demo.js" "b/\346\235\250\351\221\253\344\273\252/20230214\344\275\234\344\270\232/demo.js"
new file mode 100644
index 0000000000000000000000000000000000000000..792e5bfd193dfa2e1e8bf55d823c35c5d6456ec1
--- /dev/null
+++ "b/\346\235\250\351\221\253\344\273\252/20230214\344\275\234\344\270\232/demo.js"
@@ -0,0 +1,7 @@
+var greet=require("./demo1");
+var a=10;
+var b=5;
+console.log(greet.add(a,b));
+console.log(greet.jian(a,b));
+console.log(greet.cheng(a,b));
+console.log(greet.chu(a,b));
\ No newline at end of file
diff --git "a/\346\235\250\351\221\253\344\273\252/20230214\344\275\234\344\270\232/demo1.js" "b/\346\235\250\351\221\253\344\273\252/20230214\344\275\234\344\270\232/demo1.js"
new file mode 100644
index 0000000000000000000000000000000000000000..93e9a57187b4cdaaff0fc4ee6c7d1891086dfa0e
--- /dev/null
+++ "b/\346\235\250\351\221\253\344\273\252/20230214\344\275\234\344\270\232/demo1.js"
@@ -0,0 +1,17 @@
+
+function add(a,b){
+return a+b;
+}
+function jian(a,b){
+    return a-b;
+}
+function cheng(a,b){
+    return a*b;
+}
+function chu(a,b){
+    return a/b;
+}
+module.exports.add=add;
+module.exports.jian=jian;
+module.exports.cheng=cheng;
+module.exports.chu=chu;