3.21.frm

来自「VB6.0应用例题」· FRM 代码 · 共 37 行

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "Form1"
   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 Sub Form_Click()
  Dim Sum As Long, I As Integer
  Dim Flag As Boolean         '当Flag=True时该自然数不是素数
  Sum = 0
  For I = 3 To 1000
    Flag = False
    J = 2                   '从2开始试除
    Do While J <= I - 1
      If I Mod J = 0 Then
        Flag = True     '该自然数能被整除，不是素数
        Exit Do
      Else
        J = J + 1
      End If
    Loop
    If Not Flag Then Sum = Sum + I
  Next I
  Print "前1000个自然数中素数之和为"; Sum
End Sub