diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..f68d109
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,29 @@
+### IntelliJ IDEA ###
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store
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diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 0000000..26d3352
--- /dev/null
+++ b/.idea/.gitignore
@@ -0,0 +1,3 @@
+# Default ignored files
+/shelf/
+/workspace.xml
diff --git a/.idea/misc.xml b/.idea/misc.xml
new file mode 100644
index 0000000..0548357
--- /dev/null
+++ b/.idea/misc.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
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diff --git a/.idea/modules.xml b/.idea/modules.xml
new file mode 100644
index 0000000..5d9ee31
--- /dev/null
+++ b/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/demoForCaculator.iml" filepath="$PROJECT_DIR$/demoForCaculator.iml" />
+    </modules>
+  </component>
+</project>
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diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000..94a25f7
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/demoForCaculator.iml b/demoForCaculator.iml
new file mode 100644
index 0000000..c90834f
--- /dev/null
+++ b/demoForCaculator.iml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
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diff --git a/src/Caculator.fxml b/src/Caculator.fxml
new file mode 100644
index 0000000..ad7428e
--- /dev/null
+++ b/src/Caculator.fxml
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<?import javafx.scene.control.*?>
+<?import javafx.scene.layout.*?>
+
+<?import javafx.geometry.Insets?>
+<VBox alignment="CENTER" spacing="10.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="CalculatorController">
+    <padding>
+        <Insets left="20.0" right="20.0" top="20.0"/>
+    </padding>
+    <HBox alignment="CENTER" spacing="10.0">
+        <TextField fx:id="number1Field" alignment="CENTER" promptText="Enter first number" />
+        <ChoiceBox fx:id="operatorChoiceBox" />
+        <TextField fx:id="number2Field" alignment="CENTER" promptText="Enter second number" />
+        <Button text="=" onAction="#handleCalculateAction" />
+    </HBox>
+    <Label fx:id="resultLabel" />
+</VBox>
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diff --git a/src/Caculator.java b/src/Caculator.java
new file mode 100644
index 0000000..557f765
--- /dev/null
+++ b/src/Caculator.java
@@ -0,0 +1,24 @@
+import javafx.application.Application;
+import javafx.fxml.FXMLLoader;
+import javafx.scene.Scene;
+import javafx.scene.layout.VBox;
+import javafx.stage.Stage;
+
+import java.net.URL;
+
+public class Caculator extends Application {
+
+    @Override
+    public void start(Stage primaryStage) throws Exception {
+        URL url = getClass().getResource("Caculator.fxml");
+        VBox root = FXMLLoader.load(url);
+        Scene scene = new Scene(root);
+        primaryStage.setScene(scene);
+        primaryStage.setTitle("模拟计算器");
+        primaryStage.show();
+    }
+
+    public static void main(String[] args) {
+        launch(args);
+    }
+}
diff --git a/src/CalculatorController.java b/src/CalculatorController.java
new file mode 100644
index 0000000..4d8abe8
--- /dev/null
+++ b/src/CalculatorController.java
@@ -0,0 +1,65 @@
+import javafx.fxml.FXML;
+import javafx.scene.control.*;
+import javafx.scene.layout.HBox;
+
+public class CalculatorController {
+
+    @FXML
+    private TextField number1Field;
+
+    @FXML
+    private ChoiceBox<String> operatorChoiceBox;
+
+    @FXML
+    private TextField number2Field;
+
+    @FXML
+    private Label resultLabel;
+
+    @FXML
+    public void initialize() {
+        // 初始化运算符下拉菜单
+        operatorChoiceBox.getItems().addAll("+", "-", "*", "/", "%");
+    }
+
+    @FXML
+    protected void handleCalculateAction() {
+        try {
+            double number1 = Double.parseDouble(number1Field.getText());
+            double number2 = Double.parseDouble(number2Field.getText());
+            String operator = operatorChoiceBox.getValue();
+
+            double result = 0;
+            switch (operator) {
+                case "+":
+                    result = number1 + number2;
+                    break;
+                case "-":
+                    result = number1 - number2;
+                    break;
+                case "*":
+                    result = number1 * number2;
+                    break;
+                case "/":
+                    if (number2 != 0) {
+                        result = number1 / number2;
+                    } else {
+                        throw new ArithmeticException("Division by zero");
+                    }
+                    break;
+                case "%":
+                    if (number2 != 0) {
+                        result = number1 % number2;
+                    } else {
+                        throw new ArithmeticException("Division by zero");
+                    }
+                    break;
+                default:
+                    throw new IllegalArgumentException("Invalid operator");
+            }
+            resultLabel.setText(String.valueOf(result));
+        } catch (Exception e) {
+            resultLabel.setText("Error: " + e.getMessage());
+        }
+    }
+}
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