Question

您好，请有人帮助我。我正在编写一个程序，用户可以输入猜谜游戏的最大数量，并使用随机发生器，他/她必须猜测从1到最大数字的数字。我已经完成了大部分但是如果用户说输入一个字母或除了整数之外的任何其他内容，我仍然坚持如何循环返回程序以输入另一个输入。来自＆＃34; do＆＃34;部分是我感到困惑的地方！

＆＃13;

import java.util.ArrayList;
import java.util.Random;
import javax.swing.JOptionPane;

public class guessinggame { // class name

    public static void main(String[] args) { // main method

        String smax = JOptionPane.showInputDialog("Enter your maximum number for the Guessing Game:");
        int max = Integer.parseInt(smax);
        do {
            if (max > 10000) {
                JOptionPane.showMessageDialog(null, "Oh no! keep your choice below 10000 please.");
                smax = JOptionPane.showInputDialog("Enter your maximum number for the Guessing Game:");
                max = Integer.parseInt(smax);
            }
        } while (max > 10000);

        int answer, guess = 0, lowcount = 0, highcount = 0, game;
        String sguess;
        Random generator = new Random();
        answer = generator.nextInt(max) + 1;

        ArrayList<String> buttonChoices = new ArrayList<String>(); // list of string arrays called buttonChoices 
        buttonChoices.add("1-" + max + " Guessing Game");

        Object[] buttons = buttonChoices.toArray(); // turning the string arrays into objects called buttons

        game = JOptionPane.showOptionDialog(null, "Play or Quit?", "Guessing Game",
                JOptionPane.PLAIN_MESSAGE, JOptionPane.QUESTION_MESSAGE,
                null, buttons, buttonChoices.get(0));

        do {
            sguess = JOptionPane.showInputDialog("I am thinking of a number between 1 and " + max + ". Have a guess:");
            try {
                guess = Integer.parseInt(sguess);
            } catch (NumberFormatException nfe) {
                JOptionPane.showMessageDialog(null, "That was not a number! ");

            }

            if (guess < answer) {
                JOptionPane.showMessageDialog(null, "That is too LOW!");
                lowcount++;

            } else {
                JOptionPane.showMessageDialog(null, "That is too HIGH!");
                highcount++;
            }
            break;

        } while (guess != answer);
        JOptionPane.showMessageDialog(null, "Well Done!" + "\n---------------" + "\nThe answer was " + answer + "\nLow Guesses: " + lowcount
                + "\nHigh Guesses: " + highcount + "\n\nOverall you guessed: " + (lowcount + highcount) + " Times");

        System.exit(0);
    }
}

＆＃13;

Answer 1

首先，最后一个是break中的do-while。如果你在循环内没有条件break;它不是一个循环;它是一个单执行块。

除此之外，您应该在您验证输入的区域中遵循此结构。（伪代码，所以你可以实现）。

Do-While input does not equal answer
    Get input from user with dialogue

    Begin Try
        Parse user input
        If input > answer
           Notify user
        Else-If input < answer
           Notify user
    End Try
    Begin Catch Parse error
        Alert user of invalid input
    End Catch
End While

我该如何修复这个简单的程序？猜谜游戏

1 个答案: