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程式碼:
Private Sub Command1_Click()
a = Val(InputBox("輸入一個正整數"))
If a >= 2 Then
msg = "1~" & a & "之間的質數有" & vbCr & "2" & vbCr
End If
For i = 1 To a Step 2
x = 0
For j = 1 To i
If i Mod j = 0 Then x = x + 1
Next j
If x = 2 Then msg = msg & i & vbCr
Next i
MsgBox msg
End Sub
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