frmifthe.frm

Visual Basic 6 大学教程的代码

VERSION 5.00
Begin VB.Form frmIfThen 
   Caption         =   "Fig. 3.18: Testing the comparison operators"
   ClientHeight    =   4365
   ClientLeft      =   2250
   ClientTop       =   1725
   ClientWidth     =   5205
   BeginProperty Font 
      Name            =   "MS Sans Serif"
      Size            =   8.25
      Charset         =   0
      Weight          =   700
      Underline       =   0   'False
      Italic          =   0   'False
      Strikethrough   =   0   'False
   EndProperty
   ForeColor       =   &H80000008&
   LinkTopic       =   "Form1"
   PaletteMode     =   1  'UseZOrder
   ScaleHeight     =   4365
   ScaleWidth      =   5205
   Begin VB.CommandButton cmdEnterNumbers 
      Appearance      =   0  'Flat
      BackColor       =   &H80000005&
      Caption         =   "Enter Numbers"
      BeginProperty Font 
         Name            =   "MS Sans Serif"
         Size            =   12
         Charset         =   0
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   735
      Left            =   435
      TabIndex        =   0
      Top             =   3405
      Width           =   2175
   End
   Begin VB.CommandButton cmdExit 
      Appearance      =   0  'Flat
      BackColor       =   &H80000005&
      Caption         =   "Exit"
      BeginProperty Font 
         Name            =   "MS Sans Serif"
         Size            =   12
         Charset         =   0
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   735
      Left            =   3345
      TabIndex        =   1
      Top             =   3420
      Width           =   1455
   End
   Begin VB.Label lblDisplay4 
      BeginProperty Font 
         Name            =   "MS Sans Serif"
         Size            =   12
         Charset         =   0
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   495
      Left            =   420
      TabIndex        =   5
      Top             =   2670
      Width           =   4320
   End
   Begin VB.Label lblDisplay3 
      BeginProperty Font 
         Name            =   "MS Sans Serif"
         Size            =   12
         Charset         =   0
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   495
      Left            =   480
      TabIndex        =   4
      Top             =   1920
      Width           =   4320
   End
   Begin VB.Label lblDisplay2 
      BeginProperty Font 
         Name            =   "MS Sans Serif"
         Size            =   12
         Charset         =   0
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   495
      Left            =   480
      TabIndex        =   3
      Top             =   1080
      Width           =   4215
   End
   Begin VB.Label lblDisplay1 
      BeginProperty Font 
         Name            =   "MS Sans Serif"
         Size            =   12
         Charset         =   0
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   495
      Left            =   480
      TabIndex        =   2
      Top             =   240
      Width           =   4215
   End
End
Attribute VB_Name = "frmIfThen"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
' Code listing for Fig. 3.18
' Program compares two numbers
Option Explicit    ' Force explicit declarations

Private Sub cmdEnterNumbers_Click()
   Dim num1 As Integer, num2 As Integer

   ' Clear Labels
   lblDisplay1.Caption = ""
   lblDisplay2.Caption = ""
   lblDisplay3.Caption = ""
   lblDisplay4.Caption = ""

   ' Get values from user
   num1 = InputBox("Enter first integer", "Input")
   num2 = InputBox("Enter second integer", "Input")

   ' Test the relationships between the numbers
   If num1 = num2 Then
      lblDisplay1.Caption = num1 & " is equal to " & num2
   End If

   If num1 <> num2 Then
      lblDisplay1.Caption = num1 & " is not equal to " & num2
   End If
   
   If num1 > num2 Then
      lblDisplay2.Caption = num1 & " is greater than " & num2
   End If

   If num1 < num2 Then
      lblDisplay2.Caption = num1 & " is less than " & num2
   End If
   
   If num1 >= num2 Then
      lblDisplay3.Caption = num1 & _
                            " is greater than or equal to " _
                            & num2
   End If
      
   If num1 <= num2 Then
      lblDisplay4.Caption = num1 & _
                            " is less than or equal to " & num2
   End If

End Sub

Private Sub cmdExit_Click()
   End
End Sub