form1.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         =   "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
Sub Form_Click()
Dim n As Integer, i As Integer, k As Integer
n = InputBox("请输入一个正整数(≥3)")
i = 2: k = Int(n / 2)
Do While i <= k
If n Mod i = 0 Then
Exit Do     '一旦被某个数整除，则退出循环
Else
i = i + 1
End If
Loop
If i > k Then Print n; "是素数" Else Print n; "不是素数"
End Sub