while_wend.frm

vb编程+从基础到实践光盘代码

VERSION 5.00
Begin VB.Form While_Wend 
   Caption         =   "求阶乘的和"
   ClientHeight    =   1470
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   3270
   LinkTopic       =   "Form1"
   ScaleHeight     =   1470
   ScaleWidth      =   3270
   StartUpPosition =   3  '窗口缺省
End
Attribute VB_Name = "While_Wend"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Private Sub Form_Click()
Dim n As Integer, i As Integer, sum As Double
Dim k As Double
n = Val(InputBox("请输入n的值："))
i = 1
k = 1
While i <= n
  k = k * i
  sum = sum + k
  i = i + 1
  Wend
Print "1!加到"; n; "!="; sum
End Sub