222

Main.java

@@ -1,107 +1,120 @@
-import java.util.Scanner;
-
-public class Main {
-
-    public static void main(String[] args) {
-        Scanner scanner = new Scanner(System.in);
-
-        System.out.println("欢迎使用简单计算器！");
-        System.out.println("请选择操作：");
-        System.out.println("1. 加法");
-        System.out.println("2. 减法");
-        System.out.println("3. 乘法");
-        System.out.println("4. 除法");
-        System.out.println("5. 取余");
-        System.out.print("输入你的选择(1/2/3/4/5): ");
-
-        int choice = scanner.nextInt();
-
-        switch (choice) {
-            case 1:
-                performAddition(scanner);
-                break;
-            case 2:
-                performSubtraction(scanner);
-                break;
-            case 3:
-                performMultiplication(scanner);
-                break;
-            case 4:
-                performDivision(scanner);
-                break;
-            case 5:
-                performModulus(scanner);
-                break;
-            default:
-                System.out.println("无效选择，请重试。");
+import javafx.application.Application;
+import javafx.beans.binding.Bindings;
+import javafx.beans.property.*;
+import javafx.geometry.Pos;
+import javafx.scene.Scene;
+import javafx.scene.control.*;
+import javafx.scene.layout.*;
+import javafx.stage.Stage;
+
+public class Main extends Application {
+    private TextField display = new TextField();
+    private Button[] numberButtons = new Button[10];
+    private Button addButton, subtractButton, multiplyButton, divideButton, modulusButton, equalsButton, clearButton;
+    private Label statusLabel = new Label("");
+
+    private SimpleDoubleProperty firstOperand = new SimpleDoubleProperty(0);
+    private SimpleDoubleProperty secondOperand = new SimpleDoubleProperty(0);
+    private String operator = "";
+
+    @Override
+    public void start(Stage primaryStage) {
+        GridPane grid = new GridPane();
+        grid.setAlignment(Pos.CENTER);
+        grid.setHgap(10);
+        grid.setVgap(10);
+
+        display.setEditable(false);
+        grid.add(display, 0, 0, 4, 1);
+
+        for (int i = 0; i < 10; i++) {
+            numberButtons[i] = new Button(String.valueOf(i));
+            grid.add(numberButtons[i], (i % 3), (i / 3) + 1);
         }
 
-        scanner.close();
-    }
-
-    private static void performAddition(Scanner scanner) {
-        System.out.print("输入第一个数字: ");
-        double num1 = scanner.nextDouble();
-
-        System.out.print("输入第二个数字: ");
-        double num2 = scanner.nextDouble();
-
-        double result = num1 + num2;
-
-        System.out.println("结果: " + result);
-    }
-
-    private static void performSubtraction(Scanner scanner) {
-        System.out.print("输入第一个数字: ");
-        double num1 = scanner.nextDouble();
-
-        System.out.print("输入第二个数字: ");
-        double num2 = scanner.nextDouble();
-
-        double result = num1 - num2;
+        addButton = new Button("+");
+        subtractButton = new Button("-");
+        multiplyButton = new Button("*");
+        divideButton = new Button("/");
+        modulusButton = new Button("%");
+        equalsButton = new Button("=");
+        clearButton = new Button("C");
+
+        grid.add(addButton, 3, 1);
+        grid.add(subtractButton, 3, 2);
+        grid.add(multiplyButton, 3, 3);
+        grid.add(divideButton, 3, 4);
+        grid.add(modulusButton, 3, 5);
+        grid.add(equalsButton, 3, 6);
+        grid.add(clearButton, 3, 7);
+
+        for (int i = 0; i < 10; i++) {
+            int finalI = i;
+            numberButtons[i].setOnAction(e -> display.appendText(String.valueOf(finalI)));
+        }
 
-        System.out.println("结果: " + result);
+        addButton.setOnAction(e -> setOperator("+"));
+        subtractButton.setOnAction(e -> setOperator("-"));
+        multiplyButton.setOnAction(e -> setOperator("*"));
+        divideButton.setOnAction(e -> setOperator("/"));
+        modulusButton.setOnAction(e -> setOperator("%"));
+        equalsButton.setOnAction(e -> calculate());
+        clearButton.setOnAction(e -> clear());
+
+        Scene scene = new Scene(grid, 300, 400);
+        primaryStage.setTitle("Calculator");
+        primaryStage.setScene(scene);
+        primaryStage.show();
     }
 
-    private static void performMultiplication(Scanner scanner) {
-        System.out.print("输入第一个数字: ");
-        double num1 = scanner.nextDouble();
-
-        System.out.print("输入第二个数字: ");
-        double num2 = scanner.nextDouble();
-
-        double result = num1 * num2;
-
-        System.out.println("结果: " + result);
+    private void setOperator(String op) {
+        if (!operator.isEmpty()) {
+            calculate();
+        }
+        operator = op;
+        firstOperand.setValue(Double.parseDouble(display.getText()));
+        display.clear();
     }
 
-    private static void performDivision(Scanner scanner) {
-        System.out.print("输入第一个数字: ");
-        double num1 = scanner.nextDouble();
-
-        System.out.print("输入第二个数字: ");
-        double num2 = scanner.nextDouble();
-
-        if (num2 == 0) {
-            System.out.println("错误: 除数不能为零。");
-        } else {
-            double result = num1 / num2;
-            System.out.println("结果: " + result);
+    private void calculate() {
+        if (!operator.isEmpty()) {
+            secondOperand.setValue(Double.parseDouble(display.getText()));
+            double result = 0;
+            switch (operator) {
+                case "+":
+                    result = firstOperand.get() + secondOperand.get();
+                    break;
+                case "-":
+                    result = firstOperand.get() - secondOperand.get();
+                    break;
+                case "*":
+                    result = firstOperand.get() * secondOperand.get();
+                    break;
+                case "/":
+                    if (secondOperand.get() != 0) {
+                        result = firstOperand.get() / secondOperand.get();
+                    } else {
+                        statusLabel.setText("Cannot divide by zero");
+                        return;
+                    }
+                    break;
+                case "%":
+                    result = firstOperand.get() % secondOperand.get();
+                    break;
+            }
+            display.setText(String.format("%.2f", result));
+            operator = "";
         }
     }
 
-    private static void performModulus(Scanner scanner) {
-        System.out.print("输入第一个数字: ");
-        int num1 = scanner.nextInt();
-
-        System.out.print("输入第二个数字: ");
-        int num2 = scanner.nextInt();
+    private void clear() {
+        display.clear();
+        firstOperand.setValue(0);
+        secondOperand.setValue(0);
+        operator = "";
+    }
 
-        if (num2 == 0) {
-            System.out.println("错误: 除数不能为零。");
-        } else {
-            int result = num1 % num2;
-            System.out.println("结果: " + result);
-        }
+    public static void main(String[] args) {
+        launch(args);
     }
 }