5-6.frm

本教材为“第2章”、“第4章”、“第7章”、“第8章”、“第10章”和“第12章”配备了附加练习题及答案

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "Form1"
   ClientHeight    =   6975
   ClientLeft      =   60
   ClientTop       =   405
   ClientWidth     =   5310
   BeginProperty Font 
      Name            =   "宋体"
      Size            =   15.75
      Charset         =   134
      Weight          =   400
      Underline       =   0   'False
      Italic          =   0   'False
      Strikethrough   =   0   'False
   EndProperty
   LinkTopic       =   "Form1"
   ScaleHeight     =   6975
   ScaleWidth      =   5310
   StartUpPosition =   3  '窗口缺省
   Begin VB.CommandButton Command2 
      Caption         =   "素数排序"
      Height          =   615
      Left            =   2760
      TabIndex        =   5
      Top             =   5640
      Width           =   1455
   End
   Begin VB.CommandButton Command1 
      Caption         =   "生成"
      Height          =   495
      Left            =   600
      TabIndex        =   4
      Top             =   5640
      Width           =   1215
   End
   Begin VB.ListBox List2 
      Height          =   4785
      ItemData        =   "5-6.frx":0000
      Left            =   2640
      List            =   "5-6.frx":0002
      TabIndex        =   3
      Top             =   600
      Width           =   1695
   End
   Begin VB.ListBox List1 
      Height          =   4785
      ItemData        =   "5-6.frx":0004
      Left            =   360
      List            =   "5-6.frx":0006
      TabIndex        =   1
      Top             =   600
      Width           =   1695
   End
   Begin VB.Label Label2 
      AutoSize        =   -1  'True
      Caption         =   "素数排序："
      Height          =   315
      Left            =   2640
      TabIndex        =   2
      Top             =   240
      Width           =   1575
   End
   Begin VB.Label Label1 
      AutoSize        =   -1  'True
      Caption         =   "数组元素："
      Height          =   315
      Left            =   360
      TabIndex        =   0
      Top             =   240
      Width           =   1575
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Dim a(100) As Integer, b(100) As Integer
Private Sub Command1_Click()
List1.Clear: List2.Clear
Dim i As Integer
Randomize
For i = 1 To 100
a(i) = Int(Rnd * 90) + 10
List1.AddItem a(i)
Next i
End Sub

Private Sub Command2_Click()
Dim i As Integer, j As Integer, t As Integer
Dim n As Integer
n = 0
For i = 1 To 100
  For j = 2 To Sqr(a(i))
  If a(i) Mod j = 0 Then Exit For
  Next j
  If j > Sqr(a(i)) Then
  n = n + 1: b(n) = a(i)
  End If
Next i
For i = 1 To n - 1
For j = i + 1 To n
If b(j) > b(i) Then
t = b(j): b(j) = b(i): b(i) = t
End If
Next j
Next i
For i = 1 To n
List2.AddItem b(i)
Next i
End Sub