Public Class Form1
Inherits System.Windows.Forms.Form
#Region " Windows 窗体设计器生成的代码 "
Public Sub New()
MyBase.New()
'该调用是 Windows 窗体设计器所必需的。
InitializeComponent()
'在 InitializeComponent() 调用之后添加任何初始化
End Sub
'窗体重写 dispose 以清理组件列表。
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub
'Windows 窗体设计器所必需的
Private components As System.ComponentModel.IContainer
'注意: 以下过程是 Windows 窗体设计器所必需的
'可以使用 Windows 窗体设计器修改此过程。
'不要使用代码编辑器修改它。
Friend WithEvents Button1 As System.Windows.Forms.Button
Friend WithEvents RichTextBox1 As System.Windows.Forms.RichTextBox
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
Me.Button1 = New System.Windows.Forms.Button
Me.RichTextBox1 = New System.Windows.Forms.RichTextBox
Me.SuspendLayout()
'
'Button1
'
Me.Button1.Location = New System.Drawing.Point(160, 264)
Me.Button1.Name = "Button1"
Me.Button1.Size = New System.Drawing.Size(104, 32)
Me.Button1.TabIndex = 0
Me.Button1.Text = "判 断"
'
'RichTextBox1
'
Me.RichTextBox1.Location = New System.Drawing.Point(80, 16)
Me.RichTextBox1.Name = "RichTextBox1"
Me.RichTextBox1.Size = New System.Drawing.Size(248, 224)
Me.RichTextBox1.TabIndex = 1
Me.RichTextBox1.Text = ""
'
'Form1
'
Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
Me.ClientSize = New System.Drawing.Size(440, 333)
Me.Controls.Add(Me.RichTextBox1)
Me.Controls.Add(Me.Button1)
Me.Name = "judgeForm"
Me.Text = "求素数"
Me.ResumeLayout(False)
End Sub
#End Region
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim N, I As Integer
For N = 3 To 100 '3~100循环
For I = 2 To N - 1 '2~N-1循环
If N Mod I = 0 Then Exit For
Next I
If I > N - 1 Then '判断素数
RichTextBox1.Text &= N & "是素数" & vbCrLf
End If
Next
End Sub
End Class
