斐波那契(Fibonacci)数列的构成规律是：数列的第一、二个数是1，从第三个数起，每个数是其前面两个数之和。据此，下面有求斐波那契前12项值的过程，请完善之。
Sub Fibonacci(N As Integer， s1)
s1 = 0
f1 = 1
(11)
For i = 1 To N / 2
Print f1; f2;
s1 = f1 + f2
f1 = f1 + f2
f2 = (12)
Next i
Print
End Sub
Private Sub Command1_Click( )
Dim sum As Integer
Call Fibonacci(12， sum)
Print "Sum = "; sum
End Sub
参考答案：f2=1
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