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108 lines
3.1 KiB
108 lines
3.1 KiB
import java.util.Scanner;
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public class Main {
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public static void main(String[] args) {
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Scanner scanner = new Scanner(System.in);
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System.out.println("欢迎使用简单计算器！");
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System.out.println("请选择操作：");
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System.out.println("1. 加法");
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System.out.println("2. 减法");
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System.out.println("3. 乘法");
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System.out.println("4. 除法");
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System.out.println("5. 取余");
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System.out.print("输入你的选择(1/2/3/4/5): ");
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int choice = scanner.nextInt();
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switch (choice) {
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case 1:
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performAddition(scanner);
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break;
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case 2:
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performSubtraction(scanner);
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break;
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case 3:
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performMultiplication(scanner);
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break;
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case 4:
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performDivision(scanner);
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break;
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case 5:
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performModulus(scanner);
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break;
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default:
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System.out.println("无效选择，请重试。");
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}
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scanner.close();
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}
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private static void performAddition(Scanner scanner) {
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System.out.print("输入第一个数字: ");
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double num1 = scanner.nextDouble();
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System.out.print("输入第二个数字: ");
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double num2 = scanner.nextDouble();
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double result = num1 + num2;
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System.out.println("结果: " + result);
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}
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private static void performSubtraction(Scanner scanner) {
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System.out.print("输入第一个数字: ");
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double num1 = scanner.nextDouble();
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System.out.print("输入第二个数字: ");
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double num2 = scanner.nextDouble();
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double result = num1 - num2;
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System.out.println("结果: " + result);
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}
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private static void performMultiplication(Scanner scanner) {
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System.out.print("输入第一个数字: ");
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double num1 = scanner.nextDouble();
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System.out.print("输入第二个数字: ");
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double num2 = scanner.nextDouble();
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double result = num1 * num2;
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System.out.println("结果: " + result);
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}
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private static void performDivision(Scanner scanner) {
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System.out.print("输入第一个数字: ");
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double num1 = scanner.nextDouble();
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System.out.print("输入第二个数字: ");
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double num2 = scanner.nextDouble();
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if (num2 == 0) {
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System.out.println("错误: 除数不能为零。");
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} else {
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double result = num1 / num2;
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System.out.println("结果: " + result);
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}
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}
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private static void performModulus(Scanner scanner) {
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System.out.print("输入第一个数字: ");
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int num1 = scanner.nextInt();
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System.out.print("输入第二个数字: ");
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int num2 = scanner.nextInt();
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if (num2 == 0) {
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System.out.println("错误: 除数不能为零。");
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} else {
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int result = num1 % num2;
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System.out.println("结果: " + result);
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}
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}
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}
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