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VB语句问题,用递归的方法,求任意数的阶乘.

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VB语句问题,用递归的方法,求任意数的阶乘.
VB语句问题,用递归的方法,求任意数的阶乘.
Private Sub Command1_Click()
n = InputBox("请输入阶数n:")
s = f(n)
Print n & "!=" & s
End Sub
Private Function f(ByVal n As Integer)
If n = 0 Or n = 1 Then
f = 1
Else
f = n * f(n - 1)
End If
End Function
再问: 编写求阶乘的子过程,调用该过程计算5!+6!+7!之和。麻烦了
再答: Private Sub Command1_Click() Dim n As Integer n = InputBox("请输入阶数n(n>=7):") Call sub1(n) End Sub Private Sub sub1(n As Integer) Dim i As Integer, s As Integer For i = 5 To 7 s = s + fact(i) Next i Print 5 & "!+" & 6 & "!+" & 7 & "!=" & s End Sub Private Function fact(n As Integer) fact = 1 For i = 1 To n fact = fact * i Next i End Function