feat:添加计算器功能

.idea/.gitignore

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+# 默认忽略的文件
+/shelf/
+/workspace.xml
+# 基于编辑器的 HTTP 客户端请求
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

.idea/ApifoxUploaderProjectSetting.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ApifoxUploaderProjectSetting">
+    <option name="apiAccessToken" value="APS-XcyreP6fmYRQPtrGBguxJiFaoFwNK7jA" />
+  </component>
+</project>

.idea/cyy_team.iml

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+<?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://$MODULE_DIR$" />
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

.idea/encodings.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Encoding">
+    <file url="PROJECT" charset="UTF-8" />
+  </component>
+</project>

.idea/misc.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_17" default="true" project-jdk-name="17" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

.idea/modules.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/cyy_team.iml" filepath="$PROJECT_DIR$/.idea/cyy_team.iml" />
+      <module fileurl="file://$PROJECT_DIR$/demo/demo.iml" filepath="$PROJECT_DIR$/demo/demo.iml" />
+    </modules>
+  </component>
+</project>

.idea/vcs.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>

demo/demo.iml

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+<?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="jdk" jdkName="17" jdkType="JavaSDK" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

demo/src/Main.java

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+import java.util.Scanner;
+
+public class Main {
+
+    // 加法
+    public static double add(double num1, double num2) {
+        return num1 + num2;
+    }
+
+    // 减法
+    public static double subtract(double num1, double num2) {
+        return num1 - num2;
+    }
+
+    // 乘法
+    public static double multiply(double num1, double num2) {
+        return num1 * num2;
+    }
+
+    // 除法
+    public static double divide(double num1, double num2) {
+        if (num2 == 0) {
+            System.out.println("错误: 除数不能为0");
+            return Double.NaN; // 返回无效数字
+        }
+        return num1 / num2;
+    }
+
+    // 取余
+    public static double remainder(double num1, double num2) {
+        if (num2 == 0) {
+            System.out.println("错误: 不能对0取余");
+            return Double.NaN; // 返回无效数字
+        }
+        return num1 % num2;
+    }
+
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+
+        // 输入第一个数
+        System.out.print("请输入第一个数: ");
+        double num1 = scanner.nextDouble();
+
+        // 输入运算符
+        System.out.print("请输入运算符 (+, -, *, /, %): ");
+        char operator = scanner.next().charAt(0);
+
+        // 输入第二个数
+        System.out.print("请输入第二个数: ");
+        double num2 = scanner.nextDouble();
+
+        // 结果变量
+        double result = 0;
+
+        // 根据运算符选择操作
+        switch (operator) {
+            case '+':
+                result = add(num1, num2);
+                break;
+            case '-':
+                result = subtract(num1, num2);
+                break;
+            case '*':
+                result = multiply(num1, num2);
+                break;
+            case '/':
+                result = divide(num1, num2);
+                break;
+            case '%':
+                result = remainder(num1, num2);
+                break;
+            default:
+                System.out.println("无效的运算符");
+                return;
+        }
+
+        // 输出结果
+        if (!Double.isNaN(result)) {
+            System.out.println("结果: " + result);
+        }
+
+        scanner.close();
+    }
+}