commit 9757ac0c967106e338f818043d3eb0429fa37115
Author: gxy <2107831483@qq.com>
Date: Wed Oct 9 11:12:03 2024 +0800
6218
diff --git a/UML.iml b/UML.iml
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diff --git a/src/Calculator6218.java b/src/Calculator6218.java
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+++ b/src/Calculator6218.java
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+
+import javafx.application.Application;
+import javafx.geometry.Insets;
+import javafx.geometry.Pos;
+import javafx.scene.Scene;
+import javafx.scene.control.Button;
+import javafx.scene.control.TextField;
+import javafx.scene.layout.*;
+import javafx.stage.Stage;
+
+import java.util.Stack;
+
+public class Calculator6218 extends Application {
+ private TextField display;
+ private StringBuilder currentInput = new StringBuilder();
+
+ public static void main(String[] args) {
+ launch(args);
+ }
+
+ @Override
+ public void start(Stage primaryStage) {
+ VBox root = getRoot();
+ Scene scene = new Scene(root, 300, 400);
+ primaryStage.setTitle("计算器");
+ primaryStage.setScene(scene);
+ primaryStage.show();
+ }
+
+ private VBox getRoot() {
+ // 显示区域
+ display = new TextField("0");
+ display.setEditable(false);
+ display.setAlignment(Pos.CENTER_RIGHT);
+ display.setStyle("-fx-font-size: 24; -fx-background-color: #FFFFFF; -fx-border-color: #000000;");
+
+ // 按钮布局
+ GridPane buttonGrid = new GridPane();
+ buttonGrid.setPadding(new Insets(10));
+ buttonGrid.setHgap(10);
+ buttonGrid.setVgap(10);
+
+ // 创建按钮
+ String[] buttonLabels = {
+ "%", "CE", "C", "×",
+ "1/x", "x²", "√", "÷",
+ "7", "8", "9", "-",
+ "4", "5", "6", "+",
+ "1", "2", "3", "=",
+ "+/-", "0", "."
+ };
+
+ int index = 0;
+ for (int row = 0; row < 5; row++) {
+ for (int col = 0; col < 4; col++) {
+ Button button = new Button(buttonLabels[index]);
+ button.setMinSize(50, 50);
+ button.setOnAction(event -> handleButtonClick(button.getText()));
+ buttonGrid.add(button, col, row);
+ index++;
+ }
+ }
+
+ // 主布局
+ VBox root = new VBox(10);
+ root.setPadding(new Insets(20));
+ root.getChildren().addAll(display, buttonGrid);
+ return root;
+ }
+
+ private void handleButtonClick(String buttonText) {
+ // 处理按钮点击
+ switch (buttonText) {
+ case "C":
+ display.setText("0");
+ currentInput.setLength(0);
+ break;
+ case "CE":
+ currentInput.setLength(0);
+ display.setText("0");
+ break;
+ case "=":
+ try {
+ double result = evaluateExpression(currentInput.toString());
+ display.setText(String.valueOf(result));
+ currentInput.setLength(0);
+ currentInput.append(result);
+ } catch (Exception e) {
+ display.setText("错误");
+ }
+ break;
+ case "+":
+ case "-":
+ case "×":
+ case "÷":
+ case "√":
+ case "x²":
+ case "1/x":
+ currentInput.append(convertOperator(buttonText));
+ display.setText(currentInput.toString());
+ break;
+ default:
+ currentInput.append(buttonText);
+ display.setText(currentInput.toString());
+ break;
+ }
+ }
+
+ private String convertOperator(String operator) {
+ switch (operator) {
+ case "×":
+ return "*";
+ case "÷":
+ return "/";
+ case "√":
+ return "Math.sqrt(";
+ case "x²":
+ return "^(2)";
+ case "1/x":
+ return "(1/(";
+ default:
+ return operator;
+ }
+ }
+
+ private double evaluateExpression(String expression) throws Exception {
+ // 使用简单的后缀表达式来评估表达式
+ String[] tokens = expression.split("(?<=[-+*/()])|(?=[-+*/()])");
+ Stack values = new Stack<>();
+ Stack operations = new Stack<>();
+
+ for (String token : tokens) {
+ if (isNumeric(token)) {
+ values.push(Double.parseDouble(token));
+ } else if (isOperator(token)) {
+ while (!operations.isEmpty() && precedence(token) <= precedence(operations.peek())) {
+ double b = values.pop();
+ double a = values.pop();
+ String op = operations.pop();
+ values.push(applyOperation(a, b, op));
+ }
+ operations.push(token);
+ }
+ }
+
+ while (!operations.isEmpty()) {
+ double b = values.pop();
+ double a = values.pop();
+ String op = operations.pop();
+ values.push(applyOperation(a, b, op));
+ }
+
+ return values.pop();
+ }
+
+ private boolean isNumeric(String str) {
+ return str.matches("-?\\d+(\\.\\d+)?");
+ }
+
+ private boolean isOperator(String str) {
+ return str.equals("+") || str.equals("-") || str.equals("*") || str.equals("/") ||
+ str.equals("√") || str.equals("x²") || str.equals("1/x");
+ }
+
+ private int precedence(String operator) {
+ switch (operator) {
+ case "+": case "-":
+ return 1;
+ case "×": case "÷":
+ return 2;
+ case "√": case "x²":
+ return 3;
+ default:
+ return 0;
+ }
+ }
+
+ private double applyOperation(double a, double b, String operator) throws Exception {
+ switch (operator) {
+ case "+":
+ return a + b;
+ case "-":
+ return a - b;
+ case "*":
+ return a * b;
+ case "/":
+ if (b == 0) throw new Exception("除以零");
+ return a / b;
+ case "√":
+ return Math.sqrt(b);
+ case "x²":
+ return Math.pow(a, 2);
+ case "1/x":
+ if (a == 0) throw new Exception("除以零");
+ return 1 / a;
+ default:
+ return 0;
+ }
+ }
+}
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diff --git a/src/Main.java b/src/Main.java
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index 0000000..fe7aa2b
--- /dev/null
+++ b/src/Main.java
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+//TIP 要运行代码，请按 或
+// 点击装订区域中的 图标。
+public class Main {
+ public static void main(String[] args) {
+ //TIP 当文本光标位于高亮显示的文本处时按
+ // 查看 IntelliJ IDEA 建议如何修正。
+ System.out.printf("Hello and welcome!");
+
+ for (int i = 1; i <= 5; i++) {
+ //TIP 按 开始调试代码。我们已经设置了一个 断点
+ // 但您始终可以通过按 添加更多断点。
+ System.out.println("i = " + i);
+ }
+ }
+}
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