vb编程求和sum=1!+3!+5!+.+(2n-1)!

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vb编程求和sum=1!+3!+5!+.+(2n-1)!
vb编程求和
sum=1!+3!+5!+.+(2n-1)!

vb编程求和sum=1!+3!+5!+.+(2n-1)!
Dim i As Integer
Dim j,k As Integer
Dim sum1,sum2 As Double
sum1 = 0
i = Val(InputBox("请输入一个整数"))
For j = 1 To i
sum2 = 1
For k = 1 To 2 * j - 1
sum2 = sum2 * k
Next k
sum1 = sum1 + sum2
Next j
Print sum1 '打印输出结果

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