vb编程：求a=1+3+5+.+（2n-1）的值Private Sub Form_click()Dim a As IntegerDim i As IntegerDim n As Integern = InputBox("n=")For i = 1 To n a = a + 2 * n - 1Next iPrint "n="; n, "a="; aEnd Sub怎么不对呢?

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vb编程：求a=1+3+5+.+（2n-1）的值Private Sub Form_click()Dim a As IntegerDim i As IntegerDim n As Integern = InputBox("n=")For i = 1 To n a = a + 2 * n - 1Next iPrint "n="; n, "a="; aEnd Sub怎么不对呢?
vb编程：求a=1+3+5+.+（2n-1）的值
Private Sub Form_click()
Dim a As Integer
Dim i As Integer
Dim n As Integer
n = InputBox("n=")
For i = 1 To n
a = a + 2 * n - 1
Next i
Print "n="; n, "a="; a
End Sub
怎么不对呢?

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