?? form1.frm
字號(hào):
VERSION 5.00
Begin VB.Form frmMid
Caption = "Reversing a string with Mid$ and Len"
ClientHeight = 1710
ClientLeft = 60
ClientTop = 345
ClientWidth = 4680
LinkTopic = "Form1"
ScaleHeight = 1710
ScaleWidth = 4680
StartUpPosition = 3 'Windows Default
Begin VB.TextBox txtInput
Height = 285
Left = 0
TabIndex = 3
Top = 360
Width = 4695
End
Begin VB.CommandButton cmdReverse
Caption = "Reverse the string"
Height = 375
Left = 0
TabIndex = 2
Top = 720
Width = 1815
End
Begin VB.TextBox txtOutput
Height = 285
Left = 0
TabIndex = 1
Top = 1440
Width = 4695
End
Begin VB.Label Label1
Caption = "The phrase spelled backwards is"
Height = 255
Left = 0
TabIndex = 4
Top = 1200
Width = 3015
End
Begin VB.Label lblInput
Caption = "Enter phrase"
Height = 255
Left = 0
TabIndex = 0
Top = 120
Width = 2295
End
End
Attribute VB_Name = "frmMid"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
' Fig. 8.4
' Using Mid$ and Len to reverse a string
Option Explicit
Private Sub cmdReverse_Click()
Dim phrase As String, position As Integer
txtOutput.Text = ""
phrase = txtInput.Text
For position = Len(phrase) To 1 Step -1
txtOutput.Text = txtOutput.Text & _
Mid$(phrase, position, 1)
Next
End Sub
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