import java.util.*;

public class RandomNum {

    public static void main(String[] args) {
        Random random = new Random();
        Scanner sc = new Scanner(System.in);
        int guess = 0;
        int guessNum = 0;
        String again = null;
        do {
            guess = random.nextInt(100);
            do {
                try {
                    System.out.println("请输入您猜到的数字：");
                    guessNum = sc.nextInt();
                    if (guessNum == guess) {
                        System.out.println("恭喜！猜对了！");
                        break;
                    } else if (guessNum > guess) {
                        System.out.println("大了！");
                    } else {
                        System.out.println("小了！");
                    }
                } catch (InputMismatchException e) {
                    System.out.println("请输入正确格式的数字！");
                }
            } while (true);
            System.out.println("again?(y/n)");
            again = sc.next();
            if (again.equals("n")) {
                System.out.println("End of program.");
                break;
            }
        } while (true);

    }

}