form0608.frm

VB实验教程源码

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "计算阶乘"
   ClientHeight    =   3195
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   4680
   LinkTopic       =   "Form1"
   ScaleHeight     =   3195
   ScaleWidth      =   4680
   StartUpPosition =   3  '窗口缺省
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Private Function Fun(n As Integer) As Integer
'子函数计算阶乘
    If n = 0 Or n = 1 Then    ' 结束条件n=0或n=1
        Print "n=" & n
        Fun = 1
    Else
        Print "n=" & n
        Fun = Fun(n - 1) * n
    End If
        Print "Fun=" & Fun
End Function

Private Sub Form_Click()
'单击窗体计算
    Dim Sum As Integer, i As Integer
    i = InputBox("请输入一个正整数")
    Sum = Fun(i)
End Sub