→ m9556:numArray <<你有宣告array的範圍嗎?多檢查幾次吧? 01/13 20:00
推 fumizuki:sub中應該是redim preserve array(index) ... 01/15 06:39
推 fumizuki:否則numArray就是此sub中的區域變數 01/15 06:40
Public Class Form1
Dim index As Integer = 0
Dim numOfElement As Integer = 0
Dim numArray() As Integer
Dim sum As Integer = 0
Dim average As Double
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Button1.Click
If numOfElement = 0 Then
numOfElement = CInt(TextBox1.Text)
TextBox1.Text = ""
Label2.Text = ""
If numOfElement > 0 Then
Dim numArray(numOfElement) As Integer
End If
Else
If index < numOfElement Then
numArray(index) = CInt(TextBox1.Text)
TextBox1.Text = ""
index = index + 1
End If
End If
Label1.Text = "輸入第" & CStr(index + 1) & "個數字"
If index = numOfElement Then
For index As Integer = 0 To numOfElement - 1
sum = sum + numArray(index)
Next
average = sum / numOfElement
Label2.Text = CStr(numOfElement) & "個數字的平均值是" &
CStr(average)
Label1.Text = "輸入數字個數"
numOfElement = 0
index = 0
sum = 0
End If
TextBox1.Focus()
End Sub
End Class
--
可以執行～可是執行到紅色那裡就卡死
出現：第一個可能發生的例外狀況類型 'System.NullReferenceException' 發生於
WindowsApplication1.exe
然後我看了說明
他說要我加new
不過加了編譯後就告訴我陣列不能這樣搞
那....問題在哪裡？
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