a.frm

加密算法之一加密算法a

VERSION 5.00
Begin VB.Form A 
   Caption         =   "加密算法A"
   ClientHeight    =   6645
   ClientLeft      =   60
   ClientTop       =   450
   ClientWidth     =   7065
   BeginProperty Font 
      Name            =   "宋体"
      Size            =   9.75
      Charset         =   0
      Weight          =   400
      Underline       =   0   'False
      Italic          =   0   'False
      Strikethrough   =   0   'False
   EndProperty
   LinkTopic       =   "Form1"
   ScaleHeight     =   6645
   ScaleWidth      =   7065
   StartUpPosition =   2  'CenterScreen
   Begin VB.CommandButton Command5 
      Caption         =   "重新操作"
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   12
         Charset         =   0
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   495
      Left            =   5520
      TabIndex        =   8
      Top             =   5280
      Width           =   1215
   End
   Begin VB.CommandButton Command4 
      Caption         =   "清除明文"
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   12
         Charset         =   0
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   495
      Left            =   2280
      TabIndex        =   7
      Top             =   2400
      Width           =   1215
   End
   Begin VB.CommandButton Command3 
      Caption         =   "解密"
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   12
         Charset         =   0
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   495
      Left            =   5520
      TabIndex        =   6
      Top             =   4320
      Width           =   1215
   End
   Begin VB.TextBox Text2 
      BackColor       =   &H8000000F&
      Enabled         =   0   'False
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   14.25
         Charset         =   134
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      ForeColor       =   &H00000000&
      Height          =   1455
      Left            =   480
      MultiLine       =   -1  'True
      ScrollBars      =   2  'Vertical
      TabIndex        =   5
      Top             =   4320
      Width           =   4815
   End
   Begin VB.CommandButton Command2 
      Caption         =   "退出"
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   12
         Charset         =   0
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   495
      Left            =   4080
      TabIndex        =   3
      Top             =   2400
      Width           =   1215
   End
   Begin VB.CommandButton Command1 
      Caption         =   "加密"
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   12
         Charset         =   0
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   495
      Left            =   480
      TabIndex        =   2
      Top             =   2400
      Width           =   1215
   End
   Begin VB.TextBox Text1 
      BeginProperty Font 
         Name            =   "MS Sans Serif"
         Size            =   13.5
         Charset         =   0
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   1335
      Left            =   480
      MultiLine       =   -1  'True
      ScrollBars      =   2  'Vertical
      TabIndex        =   1
      Top             =   720
      Width           =   4815
   End
   Begin VB.Line Line1 
      BorderWidth     =   2
      X1              =   360
      X2              =   6600
      Y1              =   3360
      Y2              =   3360
   End
   Begin VB.Label Label2 
      Caption         =   "输出密文："
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   15
         Charset         =   134
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   375
      Left            =   480
      TabIndex        =   4
      Top             =   3720
      Width           =   1455
   End
   Begin VB.Label Label1 
      AutoSize        =   -1  'True
      Caption         =   "输入明文："
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   15
         Charset         =   134
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   300
      Left            =   480
      TabIndex        =   0
      Top             =   240
      Width           =   1575
   End
End
Attribute VB_Name = "A"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Rem 这是加密算法A
Option Explicit


Private Sub Command1_Click()
Dim Str1 As String, Str2 As String, ch As String
Dim strlen As Integer, i As Integer, chx As Integer

Str1 = Trim(Text1.Text)
Rem 将输入文本框的字符串的前后空格去掉后赋值给Str1

strlen = Len(Str1)
Rem 求字符串的长度

For i = 1 To strlen

ch = Mid(Str1, i, 1)
Rem 取第i个字符

chx = Asc(ch)
Rem 求第i个字符的ASCII值

 
If chx Mod 2 = 0 Then
chx = chx + 1
Rem 如果该字符的ASCII值为偶数，chx+1

Else
chx = chx - 1
Rem 如果该字符的ASCII值为奇数，chx-1

End If


Str2 = Str2 & Chr(chx)


Text2.Text = Str2

Next i

End Sub

Private Sub Command2_Click()

End
End Sub

Private Sub Command3_Click()

Text1.BackColor = &H8000000F

Dim Str1 As String, Str2 As String, ch As String
Dim strlen As Integer, i As Integer, chx As Integer

Str2 = Text2.Text

strlen = Len(Str2)

For i = 1 To strlen

chx = Asc(Mid(Str2, i, 1))
 
If chx Mod 2 = 0 Then
chx = chx + 1

Else
chx = chx - 1

End If

Str1 = Str1 & Chr(chx)

Text1.Text = Str1

Next i
End Sub

Private Sub Command4_Click()
Text1.Text = ""

End Sub

Private Sub Command5_Click()
Text1.Text = ""
Text2.Text = ""
Text1.BackColor = &H80000005

End Sub