ymr/src/MathApp.java

import java.util.Scanner;

public class MathApp {
    private static LoginService loginService;
    private static Scanner scanner = new Scanner(System.in);
    private static String currentType = "小学";  // 默认账户类型是 "小学"

    public static void main(String[] args) {

        AccountService accountService = new AccountServiceImpl();
        accountService.setAccounts(currentType);

        loginService = new LoginServiceImpl(accountService);


        while (true) {
            login();
        }
    }


    public static void login() {

        System.out.print("请输入用户名和密码（空格隔开）：");
        String input = scanner.nextLine();


        String[] credentials = input.split(" ");

        if (credentials.length != 2) {
            System.out.println("格式错误，请重新输入！");
            return;
        }

        String username = credentials[0].trim();
        String password = credentials[1].trim();

        if (loginService.authenticate(username, password)) {
            System.out.println("登录成功！");


            System.out.println("当前选择为 " + currentType + " 出题");


            generateQuestions();
        } else {
            System.out.println("用户名或密码错误，请重新输入！");
        }
    }

    public static void generateQuestions() {
        System.out.print("请输入生成题目数量（输入-1退出登录）：");
        int numQuestions = scanner.nextInt();
        scanner.nextLine();

        if (numQuestions == -1) {
            System.out.println("退出登录！");
            return;
        }

        if (numQuestions < 10 || numQuestions > 30) {
            System.out.println("请输入有效的题目数量（10-30）！");
            return;
        }

        System.out.println("生成 " + numQuestions + " 道题目...");


    }


    public static void switchAccountType() {
        System.out.print("请输入要切换的账户类型（小学、初中或高中）：");
        String type = scanner.nextLine().trim();

        if (type.equals("小学") || type.equals("初中") || type.equals("高中")) {
            currentType = type;
            AccountService accountService = new AccountServiceImpl();
            accountService.setAccounts(currentType);

            loginService = new LoginServiceImpl(accountService);

            System.out.println("系统提示：准备生成 " + currentType + " 数学题目，请输入生成题目数量");
        } else {
            System.out.println("请输入小学、初中和高中三个选项中的一个");
        }
    }
}