Question

我的任务是创建一个允许用户在同一个数组中输入问题和答案（真或假）的程序，如果您要阅读该文件，则该程序如下所示：

auto

然后需要提出问题并随机选择五个以显示输出。我的问题是，每当我尝试调试时，它都无法读取文件而是返回错误。

"Question 1", "T"

我的问题出现在 LoadData（）子行中的这一行：

        Private Sub Quiz(sender As System.Object, e As System.EventArgs) Handles btnQuiz.Click
    If Viewed = True Then
        LoadData()
        RandomizeStrings()
        Duplicates()
        frmQuiz.Show()
        correct = 0
        answers = 0
        count = 0
    Else : MsgBox("You must view the slide show before you take the quiz!", MsgBoxStyle.Information, "View Slide Show")
    End If
End Sub
Private Sub AddQuestion(sender As System.Object, e As System.EventArgs) Handles btnQuestions.Click
    pass = "sample01"
    response = InputBox("Please enter the administrator password.", "Password")
    If response = pass Then
        Do
            FileOpen(1, "W:\Visual Studio 2010\Projects\Culminating\assets\questions.txt", OpenMode.Append)
            question = InputBox("Enter new question (true or false format).", "New Question")
            If question = String.Empty Then
                Exit Do
                FileClose(1)
            End If
            answer = InputBox("Enter new answer (either 'T' or 'F').", "New Answer")
            answer = StrConv(answer, vbUpperCase)
            If answer = String.Empty Then
                question = String.Empty
                Exit Do
                FileClose(1)
            End If
            WriteLine(1, question, answer)
        Loop
    Else : MsgBox("Incorrect password. Please enter again.", MsgBoxStyle.Critical, "Incorrect Password")
    End If
End Sub
Public Sub LoadData()
    FileOpen(1, "W:\Visual Studio 2010\Projects\Culminating\assets\questions.txt", OpenMode.Input)
    Do While Not EOF(1)
        count = count + 1
        Input(1, question(count))
        Input(1, answer(count))
    Loop
    FileClose(1)
End Sub
Public Sub RandomizeStrings()
    Dim x As Object
    Randomize()
    For x = 1 To 5
        num(x) = Int((count - 1 + 1) * Rnd() + 1)
    Next x
End Sub
Public Sub Duplicates()
    Dim y As Object
    Dim x As Object
    For x = 1 To 4
        For y = (x + 1) To 5
            If num(x) = num(y) Then
                num(x) = Int((count - 1 + 1) * Rnd() + 1)
                x = 1
            End If
        Next y
    Next x
End Sub

此时，它给了我这个错误：

对象引用未设置为对象的实例。

我真的不知道我的方式，因为我正在遵循我们的老师给我们的样本，我不想走出困境并使用不同的方法来完成这项任务（即使我认为这已经过时了。

读取文件时，对象返回null

0 个答案: