4.21.frm

VB6.0应用例题

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "函数应用"
   ClientHeight    =   3195
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   4680
   LinkTopic       =   "Form1"
   ScaleHeight     =   3195
   ScaleWidth      =   4680
   StartUpPosition =   3  '窗口缺省
   Begin VB.CommandButton Command1 
      Caption         =   "求e"
      Height          =   495
      Left            =   2760
      TabIndex        =   0
      Top             =   1680
      Width           =   1215
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Private Sub Command1_Click()
    Dim I As Integer, e As Single, F As Long
    For I = 0 To 10
        F = Factorial(I)        '调用求阶乘值的Factorial函数过程
        e = e + 1 / F
    Next I
    Print "e="; e
End Sub
Function Factorial(X As Integer) As Long
    Dim I As Integer, T As Long
    T = 1
    For I = 1 To X
        T = T * I
    Next I
    Factorial = T           '由函数过程名Factorial返回阶乘值
End Function