不用到localdate函数

如果你想避免直接使用`LocalDate`，可以创建一个包含月份和天数的数据结构来模拟用户的生日，然后通过比较两个结构来进行猜测。以下是一个简化版的程序示例：

import java.util.Scanner;

class BirthdayGuess {
    private int year;
    private int month;
    private int day;

    public BirthdayGuess(int year, int month, int day) {
        this.year = year;
        this.month = month;
        this.day = day;
    }

    public boolean isBefore(BirthdayGuess other) {
        int myTotalDays = getNumberOfDaysInMonth(month, year) + day - 1;
        int theirTotalDays = getNumberOfDaysInMonth(other.month, other.year) + other.day - 1;
        return myTotalDays < theirTotalDays;
    }

    // 自己计算每个月的天数，这里为了简单只考虑非闰年的规则
    private int getNumberOfDaysInMonth(int month, int year) {
        switch (month) {
            case 1:
            case 3:
            case 5:
            case 7:
            case 8:
            case 10:
            case 12:
                return 31;
            case 4:
            case 6:
            case 9:
            case 11:
                return 30;
            default: // February
                if ((year % 4 != 0 && year % 100 != 0) || (year % 400 == 0)) { // 非闰年
                    return 28;
                } else { // 闰年
                    return 29;
                }
        }
    }

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        // 用户输入生日信息
        System.out.println("请输入你的出生年份、月份和日子，用空格分隔，例如2000 06 15:");
        String[] birthdayParts = scanner.nextLine().split(" ");
        BirthdayGuess userBirth = new BirthdayGuess(Integer.parseInt(birthdayParts[0]), Integer.parseInt(birthdayParts[1]), Integer.parseInt(birthdayParts[2]));

        // 猜测直到正确
        BirthdayGuess computerGuess = new BirthdayGuess(1900, 1, 1); // 假设从1900年开始
        while (true) {
            if (userBirth.isBefore(computerGuess)) {
                System.out.println("恭喜！你的生日比我的早一些。请继续猜测。");
                computerGuess = incrementMonth(computerGuess);
            } else if (userBirth.isAfter(computerGuess)) {
                System.out.println("哎呀，有点儿晚了哦！你的生日比我晚一些。请继续猜测。");
                userBirth = incrementMonth(userBirth);
            } else {
                System.out.println("哇！我猜对了！你的生日是：" + userBirth);
                break;
            }
        }
    }

    // 单月加一
    private static BirthdayGuess incrementMonth(BirthdayGuess birthday) {
        int oldMonth = birthday.month;
        int daysInNewMonth = getNumberOfDaysInMonth(oldMonth + 1, birthday.year);
        birthday.month++;
        if (birthday.month > 12) {
            birthday.month = 1;
            birthday.year++;
        }
        birthday.day = Math.min(daysInNewMonth, birthday.day + 1);
        return birthday;
    }
}

这个版本的程序不再依赖`LocalDate`类，而是通过自定义的生日结构和一些辅助函数实现了猜测过程。