Question

我正在开发一款游戏，玩家在其中进行随机类型的基本算术问题。当游戏结束时显示结果时，它将显示一条消息：“您以％d次尝试总共回答了％d个问题，您的得分为％.1f %%”。但是，当用户输入的值不是其期望的问题数量的整数时，每次尝试的次数和问题的数量都会不同。问题的数量和尝试的数量始终是相同的，因此它将始终输出100％的分数。相反，当用户第一次输入整数时，系统会提示他们输入要回答的问题数，如果他们回答错误甚至一次，则游戏结束时百分比分数的输出将为“ 0.0％”。

我尝试使用try块内的try块捕获NumberFormatException，因为只有在它们输入的值不是整数时，才会发生这种情况。

public static void randomArithmeticGame()
{
    //RNG
    int randNum;
    boolean isValidInput = false;
    boolean isInRange = false;
    JOptionPane.showMessageDialog(null, "Welcome to the random arithmetic test", "Welcome", JOptionPane.INFORMATION_MESSAGE);
    Addition a;
    Subtraction s;
    Multiplication m;
    int ans;
    while(!isValidInput)
    {
        try
        {
            int numberOfQuestions = Integer.parseInt(JOptionPane.showInputDialog(null, "How many questions would you like? (-1 to return to main menu)", "How many questions", JOptionPane.INFORMATION_MESSAGE));
            while(!isInRange)
            {
                if(numberOfQuestions == -1)
                {
                    //get out of loop if user enters -1 and go to bottom of block
                    break;
                }
                //do this while the number is not in range
                if(numberOfQuestions > 10 || numberOfQuestions < 1)
                {
                    //tell user that the number entered is out of range
                    JOptionPane.showMessageDialog(null, "Number of questions is not between 1 and 10, Please try again.", "ERROR", JOptionPane.INFORMATION_MESSAGE);
                    try
                    {
                        numberOfQuestions = Integer.parseInt(JOptionPane.showInputDialog(null, "How many questions would you like? (-1 to return to main menu)"));
                    }
                    catch(NumberFormatException exception)
                    {
                        //catch exception
                        JOptionPane.showMessageDialog(null, "Number entered was not an integer. Please try again.", "ERROR", JOptionPane.INFORMATION_MESSAGE);
                    }
                }
                else
                {
                    //if number is in range then break out of loop
                    isInRange = true;
                    isValidInput = true;
                }
            }
            for(int i = 0; i < numberOfQuestions; i++)
            {
                randNum = (int)(Math.random()*3 + 1);
                if(randNum == 1)
                {
                    //generate addition if rng is 1
                    a = new Addition();
                    ans = a.getAnswer();
                    a.checkAnswer(ans);
                }
                if(randNum == 2)
                {
                    //generate subtraction if rng is 2
                    s = new Subtraction();
                    ans = s.getAnswer();
                    s.checkAnswer(ans);
                }
                if(randNum == 3)
                {
                    //generate multiplication if rng is 3
                    m = new Multiplication();
                    ans = m.getAnswer();
                    m.checkAnswer(ans);
                }
            }
        }
        catch(NumberFormatException exception)
        {
            //catch exception
            JOptionPane.showMessageDialog(null, "Number entered was not an integer. Please try again.", "ERROR", JOptionPane.INFORMATION_MESSAGE);
        }
    }

    int finalScoreQuestionNum = Addition.getNumberOfAdditionQuestions() + Subtraction.getNumberOfSubtractionQuestions() + Multiplication.getNumberOfMultiplicationQuestions();
    int finalScoreResponseNum = Addition.getNumberOfResponses() + Subtraction.getNumberOfResponses() + Multiplication.getNumberOfResponses();
    double finalScorePercentage = (finalScoreQuestionNum/finalScoreResponseNum)*100.0;
    String finalScoreMessage = String.format("You answered %d questions with %d total attempts, your score is %.1f%%", finalScoreQuestionNum, finalScoreResponseNum, finalScorePercentage);
    //show user how mantt questions they did, number of attempts they made, as well as their final score and percentage
    JOptionPane.showMessageDialog(null, finalScoreMessage, "Results", JOptionPane.INFORMATION_MESSAGE);
}

输出应显示用户提出的问题数量，他们尝试的次数及其百分比得分。但是，只有当用户在游戏开始时输入的问题数没有输入整数时，尝试的百分比和尝试次数才相同。

Answer 1

问题是您将int除以finalScoreQuestionNum/finalScoreResponseNum。

如果某个值0

算术问答游戏中每次运行时屏幕上游戏中随机出现的问题数量

1 个答案: