例［10-3］.frm

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 Visual Basic 程序设计教程（第四版） 主编 蒋加伏 张林峰 找了好久的（不带密码的）

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "例［10-3］ 标准模块应用示例"
   ClientHeight    =   2910
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   3540
   LinkTopic       =   "Form1"
   ScaleHeight     =   2910
   ScaleWidth      =   3540
   StartUpPosition =   3  '窗口缺省
   Begin VB.CommandButton C1 
      Caption         =   "计算"
      Height          =   495
      Left            =   360
      TabIndex        =   3
      Top             =   1800
      Width           =   1215
   End
   Begin VB.TextBox T1 
      Height          =   495
      Left            =   2040
      TabIndex        =   2
      Top             =   1800
      Width           =   1215
   End
   Begin VB.OptionButton Op2 
      Caption         =   "200-400之间素数"
      Height          =   495
      Left            =   360
      TabIndex        =   1
      Top             =   720
      Width           =   1935
   End
   Begin VB.OptionButton Op1 
      Caption         =   "100-200之间素数"
      Height          =   375
      Left            =   360
      TabIndex        =   0
      Top             =   240
      Width           =   1815
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Private Sub C1_Click()
's用来存放素数和， a是范围的起始值，b是范围的终止值，i是循环控制变量
Dim s As Long, a As Integer, b As Integer, i As Integer
  '根据单选按钮的选择来确定范围的起始值和终止值
  If Op1.Value = True Then
     a = 100
     b = 200
  ElseIf Op2.Value = True Then
     a = 200
     b = 400
  End If
  '求范围内素数和
  For i = a To b
     If isprime(i) = True Then
          s = s + i
     End If
  Next i
  '素数和显示在文本框中
  T1.Text = s
End Sub