例5.14 求自然对数e的近似值.frm

来自「蒋加伏主编VB程序设计第四版PPT及全部课本源码 北京邮电大学出版社 」· FRM 代码 · 共 31 行

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "例5.14 求自然对数e的近似值"
   ClientHeight    =   2430
   ClientLeft      =   60
   ClientTop       =   450
   ClientWidth     =   4680
   LinkTopic       =   "Form1"
   ScaleHeight     =   2430
   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 Sub Form_Click()
  Dim i%, n&, t!, e!
  Cls
  e = 0: n = 1          'e存放累加和、n存放阶乘
  i = 0: t = 1          'i计数器、t第i项的值
  Do While t > 0.00001
    e = e + t:   i = i + 1     '累加、连乘
    n = n * i:   t = 1 / n
  Loop
  CurrentX = 200: CurrentY = 200
  Print "计算了"; i; " 项的和是 "; e
End Sub