Question

我写了一个用户玩游戏并猜测答案的程序。除了我的数组之外，一切都运行良好，程序有两个数组，第一个是usersAnswers，其中包含用户选择，第二个名为decompTimeArray，其中包含正确的答案。我写了一个方法，程序将比较两个数组并计算用户有多少对错，并将它们的值放在两个单独的标签中。该程序运行正常但它总是给我0正确和不正确的标签，我将不胜感激，如果你帮我解决这个小问题，并使程序正确计算答案。这是我的代码：

public void usersAnswers()
    {


        userAnswers[0] = newspaperLbl.Text;
        userAnswers[1] = aluminumCanLbl.Text;
        userAnswers[2] = glassBottleLbl.Text;
        userAnswers[3] = plasticbagLbl.Text;
        userAnswers[4] = cupLbl.Text;
    }

    public void correctAnswers()
    {

        decompTimeArray[0] = "6 Weeks";
        decompTimeArray[1] = "10-20 Years";
        decompTimeArray[2] = "80-200 Years";
        decompTimeArray[3] = "1,000,000 Years";
        decompTimeArray[4] = "Never";
    }

    public void compareArrays()
    {
        bool arraysEqual = true;
        int index;
        if (userAnswers.Length != decompTimeArray.Length)
        {
            arraysEqual = false;

        }

        for (index = 0; index < userAnswers.Length; index++)
        {
            if (decompTimeArray[index] != userAnswers[index])
            {
                arraysEqual = false;
                wrong++;

            }
            else
            {
                arraysEqual = false;
                right++;

            }
            /*This part of the program will compare the arrays from 
             * methods 1,2 we use a for loop*/

        }

        if (arraysEqual)
        {
            Results Result = new Results();
            Result.correctAnswersLbl.Text = right.ToString("n");


        }
        else
        {
            Results Result = new Results();
            Result.incorrectAnswersLbl.Text = wrong.ToString("n");


        }
    }

    public void checkAnswersBtn_Click(object sender, EventArgs e)
    {

        Results Result = new Results();
        Result.userAnswer1Label.Text = newspaperLbl.Text;
        Result.userAnswer2Label.Text = aluminumCanLbl.Text;
        Result.userAnswer3Label.Text = glassBottleLbl.Text;
        Result.userAnswer4Label.Text = plasticbagLbl.Text;
        Result.userAnswer5Label.Text = cupLbl.Text;
        Result.correctAnswersLbl.Text = right.ToString("n");
        Result.incorrectAnswersLbl.Text = wrong.ToString("n");
        percentage = (wrong / 5) * 100;
        Result.percentageLbl.Text = percentage.ToString("p");
        this.Hide();
        Introduction Intro = new Introduction();
        Intro.Hide();
        Result.ShowDialog();






    }
}

}

Answer 1

如果wrong是integer，则您在此处进行整数除法：percentage = (wrong / 5) * 100;

例如，如果错误为4，您将获得4/5 = 0 * 100 = 0。因此，您始终会显示0。

您需要将错误转换为double（或decimal或float）或值5本身（这是首选，因为您无法真正得到'偏'答案）重写5.0。

所以

percentage = (int)((wrong / 5.0) * 100);
                            ^
                            |
      This will be a double-|

将触发正确的分割类型;现在，该操作将计算为4 / 5.0 = 0.8*100 = 80

比较两个数组，同时计算正确和错误答案的数量

1 个答案: