form1.frm

这个项目简洁、通俗地解释了有关平衡二叉树的问题。也提供了源代码和一个供演示的通用类。描述/提供了如何平衡二叉树的功能。

VERSION 5.00
Begin VB.Form Form1 
   BackColor       =   &H00E0E0E0&
   BorderStyle     =   1  'Fixed Single
   Caption         =   "Binary Trees By Muhammad Abubakar [e-mail]"
   ClientHeight    =   3435
   ClientLeft      =   45
   ClientTop       =   330
   ClientWidth     =   6420
   LinkTopic       =   "Form1"
   MaxButton       =   0   'False
   MinButton       =   0   'False
   ScaleHeight     =   3435
   ScaleWidth      =   6420
   StartUpPosition =   3  'Windows Default
   Begin VB.CommandButton Command2 
      BackColor       =   &H00FFC0C0&
      Caption         =   "&Clear Tree"
      BeginProperty Font 
         Name            =   "Arial"
         Size            =   12
         Charset         =   0
         Weight          =   400
         Underline       =   0   'False
         Italic          =   -1  'True
         Strikethrough   =   0   'False
      EndProperty
      Height          =   375
      Left            =   360
      Style           =   1  'Graphical
      TabIndex        =   4
      Top             =   2880
      Width           =   1455
   End
   Begin VB.CommandButton Command1 
      BackColor       =   &H00FFC0C0&
      Caption         =   "E&numerate"
      BeginProperty Font 
         Name            =   "Arial"
         Size            =   12
         Charset         =   0
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   375
      Left            =   4560
      Style           =   1  'Graphical
      TabIndex        =   3
      Top             =   2880
      Width           =   1455
   End
   Begin VB.ListBox List1 
      BackColor       =   &H00FFFFC0&
      BeginProperty Font 
         Name            =   "Arial"
         Size            =   12
         Charset         =   0
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   1680
      Left            =   360
      TabIndex        =   2
      Top             =   1080
      Width           =   5655
   End
   Begin VB.CommandButton Add 
      BackColor       =   &H00FFC0C0&
      Caption         =   "&Add to tree"
      BeginProperty Font 
         Name            =   "Arial"
         Size            =   12
         Charset         =   0
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   375
      Left            =   4560
      Style           =   1  'Graphical
      TabIndex        =   1
      Top             =   360
      Width           =   1455
   End
   Begin VB.TextBox Text1 
      BackColor       =   &H00FFFFC0&
      BeginProperty Font 
         Name            =   "Arial"
         Size            =   12
         Charset         =   0
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   405
      Left            =   360
      TabIndex        =   0
      Top             =   360
      Width           =   3975
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit
Private BTree As New Tree

Private Sub Add_Click()
On Error Resume Next
    
    If IsNumeric(Text1.Text) Then
        BTree.Insert CLng(Text1.Text)
    End If
    Text1.SetFocus
End Sub

Private Sub Command1_Click()
    BTree.SetListBox = List1
    BTree.EnumThem
    
End Sub

Private Sub Command2_Click()
    BTree.DeleteAll
    List1.Clear
    Text1.SetFocus
    
End Sub

Private Sub Text1_GotFocus()
    Text1.SelStart = 0
    Text1.SelLength = Len(Text1)

End Sub