Private Sub Form_Click()
Form1.AutoRedraw = True
Cls '清屏
Dim n As Integer, Factorial As Double, s As Double
Factorial = 1 '赋初值,阶乘初值为1,若为0则阶乘结果永远是0
s = 0 '此处可省略,系统默认为0
n = Val(InputBox("Please enter “n”", "Tips")) '由用户输入n的值
For i = 1 To n
Factorial = Factorial * i '求阶乘
s = s + 1 / Factorial '求和
Print "n=" & i '此处3句是显示中间计算过程,可省略
Print "Factorial=" & Factorial
Print "S=" & s
Print '输出空行,将计算过程隔开,便于查看,可省略,也可加入符号,如:“Print "****************************"”
Next i
Print "最后结果:S=" & s
End Sub
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