Question

我正在为“业务编程入门”课做作业。它使用Visual Basic2017。我们必须有一个使用do while循环和if语句跟踪学生成绩的程序。教授要求我们通过在输入框中输入-1来结束循环，但不能将其用于计算中。这是我所拥有的，并且无法正常工作。

Do
    'Prompt user for a score
    strInput = InputBox("Enter test Score")

    If Integer.TryParse(strInput, intTestScore) Then

        If intTestScore >= 0 And intTestScore <= 100 Then

            'Calculate running totals for each letter grade
            If intTestScore >= 93 Then
                'Increase student Count A by  1
                intStudentCountA += 1
                'add intTestScore to current score total A
                intTotalA += intTestScore

            ElseIf intTestScore >= 90 Then
                'Increase student Count A- by 1
                intStudentCountAMinus += 1
                'add intTestScore to current score total A-
                intTotalAMinus += intTestScore

            ElseIf intTestScore >= 87 Then
                'Increase student Count B+ by 1
                intStudentCountBPlus += 1
                'add intTestScore to current score total B+
                intTotalBPlus += intTestScore

            ElseIf intTestScore >= 83 Then
                'Increase student Count B by 1
                intStudentCountB += 1
                'add intTestScore to current score total B
                intTotalB += intTestScore

            ElseIf intTestScore >= 80 Then
                'Increase student Count B- by 1
                intStudentCountBMinus += 1
                'add intTestScore to current score total B-
                intTotalBMinus += intTestScore

            ElseIf intTestScore >= 77 Then
                'Increase student Count C+ by 1
                intStudentCountCPlus += 1
                'add intTestScore to current score total C+
                intTotalCPlus += intTestScore

            ElseIf intTestScore >= 73 Then
                'Increase student Count C by 1
                intStudentCountC += 1
                'add intTestScore to current score total C
                intTotalC += intTestScore

            ElseIf intTestScore >= 70 Then
                'Increase student Count C- by 1
                intStudentCountCMinus += 1
                'add intTestScore to current score total C-
                intTotalCMinus += intTestScore

            ElseIf intTestScore >= 67 Then
                'Increase student Count D+ by 1
                intStudentCountDPlus += 1
                'add intTestScore to current score total D+
                intTotalDPlus += intTestScore

            ElseIf intTestScore >= 63 Then
                'Increase student Count D by 1
                intStudentCountD += 1
                'add intTestScore to current score total D
                intTotalD += intTestScore

            ElseIf intTestScore >= 60 Then
                'Increase student Count D- by 1
                intStudentCountDMinus += 1
                'add intTestScore to current score total D-
                intTotalDMinus += intTestScore

            ElseIf intTestScore >= 0 Then
                'Increase student Count F by 1
                intStudentCountF += 1
                'add intTestScore to current score total F
                intTotalF += intTestScore

            End If

        End If
        'running total
        intTotal += intTestScore
        'increase student counter by 1
        intStudentCount += 1


        'add the score to listbox
        lstScore.Items.Add(intTestScore.ToString())

    Else
        MessageBox.Show("The value must be an integer. The maximum possible score is 100.")

    End If

Loop While intTestScore <> -1

我没有包括变量，因为这篇文章真的会很长。我不确定为什么仍在计算-1。有任何想法吗？预先感谢！

Answer 1

private void parseJsonToList() { itemss = clusterManagerAlgorithm.getItems(); try { items.removeAll(itemss); }catch (IndexOutOfBoundsException e){ Log.d("itemsDoesn't exist"," : "); } mClusterManager.clearItems(); mClusterManager.cluster(); mClusterManager.addItems(items); Log.d("items"," : " + items); }循环仅在最后检查条件。

它开始循环的迭代，然后获得测试分数。

public class User {
    private final int id;
    private final String username;
    private final String pwd;

    public User(int id, String username, String pwd) {
        this.id = id;
        this.username = username;
        this.pwd = pwd;
    }

    @Override
    public String toString() {
        return id + " " + username + " " + pwd;
    }

    public int getId() {
        return id;
    }

    public String getUsername() {
        return username;
    }

    public String getPwd() {
        return pwd;
    }

}

然后，它执行循环的主体，直到到达结尾，在那儿它看到得分为Do...While并退出循环。

另一种写此方法的方法是让循环无限期地运行。

'Prompt user for a score
strInput = InputBox("Enter test Score")

然后检查分数是否为-1并退出循环。

Do
    //Body
Loop While True

Visual Basic其他If语句

1 个答案: