form1.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 35 行

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "例[5-15] 输出100～200的所有素数"
   ClientHeight    =   1155
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   5640
   LinkTopic       =   "Form1"
   ScaleHeight     =   1155
   ScaleWidth      =   5640
   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 Number As Integer, x As Integer, i As Integer, k As Integer
    Number = 0
    For x = 101 To 199 Step 2         '外循环直接排除偶数，只对奇数进行判断
        i = 2: k = Int(x / 2)
        Do While i <= k                 '内循环判断x是否为素数
            If x Mod i = 0 Then Exit Do     '若x被i整除,则x不是素数，结束DO循环
            i = i + 1
        Loop
        If i > k Then                   '正常退出内循环的x值是素数
            'Print x,
            Number = Number + 1                          '统计素数的个数
            If Number Mod 5 = 0 Then Print x Else Print x, '每输出5个数就换行
        End If
    Next x
End Sub