计算器.frm

同一坐标系统下坐标有多种不同的表现形 式

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "Form1"
   ClientHeight    =   4725
   ClientLeft      =   60
   ClientTop       =   450
   ClientWidth     =   7170
   LinkTopic       =   "Form1"
   ScaleHeight     =   4725
   ScaleWidth      =   7170
   StartUpPosition =   3  '窗口缺省
   Begin VB.CommandButton Command6 
      Caption         =   "退出"
      Height          =   495
      Left            =   4200
      TabIndex        =   19
      Top             =   3960
      Width           =   1215
   End
   Begin VB.CommandButton Command5 
      Caption         =   "="
      Height          =   495
      Left            =   3000
      TabIndex        =   18
      Top             =   3960
      Width           =   1095
   End
   Begin VB.CommandButton Command4 
      Caption         =   "MOD"
      Height          =   495
      Left            =   960
      TabIndex        =   17
      Top             =   3960
      Width           =   975
   End
   Begin VB.CommandButton Command3 
      Caption         =   "清除"
      Height          =   495
      Index           =   0
      Left            =   2040
      TabIndex        =   16
      Top             =   3960
      Width           =   855
   End
   Begin VB.CommandButton Command1 
      Caption         =   "."
      Height          =   495
      Index           =   10
      Left            =   4560
      TabIndex        =   15
      Top             =   1560
      Width           =   615
   End
   Begin VB.CommandButton Command2 
      Caption         =   "/"
      Height          =   495
      Index           =   3
      Left            =   4560
      TabIndex        =   14
      Top             =   2520
      Width           =   615
   End
   Begin VB.CommandButton Command2 
      Caption         =   "*"
      Height          =   495
      Index           =   2
      Left            =   3960
      TabIndex        =   13
      Top             =   2520
      Width           =   615
   End
   Begin VB.CommandButton Command2 
      Caption         =   "-"
      Height          =   495
      Index           =   1
      Left            =   4560
      TabIndex        =   12
      Top             =   2040
      Width           =   615
   End
   Begin VB.CommandButton Command2 
      Caption         =   "+"
      Height          =   495
      Index           =   0
      Left            =   3960
      TabIndex        =   11
      Top             =   2040
      Width           =   615
   End
   Begin VB.CommandButton Command1 
      Caption         =   "9"
      Height          =   495
      Index           =   9
      Left            =   1920
      TabIndex        =   10
      Top             =   2400
      Width           =   615
   End
   Begin VB.CommandButton Command1 
      Caption         =   "8"
      Height          =   495
      Index           =   8
      Left            =   1320
      TabIndex        =   9
      Top             =   2400
      Width           =   615
   End
   Begin VB.CommandButton Command1 
      Caption         =   "7"
      Height          =   495
      Index           =   7
      Left            =   720
      TabIndex        =   8
      Top             =   2400
      Width           =   615
   End
   Begin VB.CommandButton Command1 
      Caption         =   "6"
      Height          =   495
      Index           =   6
      Left            =   1920
      TabIndex        =   7
      Top             =   1920
      Width           =   615
   End
   Begin VB.CommandButton Command1 
      Caption         =   "5"
      Height          =   495
      Index           =   5
      Left            =   1320
      TabIndex        =   6
      Top             =   1920
      Width           =   615
   End
   Begin VB.CommandButton Command1 
      Caption         =   "4"
      Height          =   495
      Index           =   4
      Left            =   720
      TabIndex        =   5
      Top             =   1920
      Width           =   615
   End
   Begin VB.CommandButton Command1 
      Caption         =   "3"
      Height          =   495
      Index           =   3
      Left            =   1920
      TabIndex        =   4
      Top             =   1440
      Width           =   615
   End
   Begin VB.CommandButton Command1 
      Caption         =   "2"
      Height          =   495
      Index           =   2
      Left            =   1320
      TabIndex        =   3
      Top             =   1440
      Width           =   615
   End
   Begin VB.CommandButton Command1 
      Caption         =   "1"
      Height          =   495
      Index           =   1
      Left            =   720
      TabIndex        =   2
      Top             =   1440
      Width           =   615
   End
   Begin VB.CommandButton Command1 
      Caption         =   "0"
      Height          =   495
      Index           =   0
      Left            =   3960
      TabIndex        =   1
      Top             =   1560
      Width           =   615
   End
   Begin VB.TextBox Text1 
      Height          =   495
      Left            =   960
      TabIndex        =   0
      Top             =   600
      Width           =   4215
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit
Dim a As Integer, b As Integer, c As Integer
Dim s As String
Private Sub Command1_Click(Index As Integer)
  If Index = 10 Then
     Text1.Text = Text1.Text & "."
  Else: Text1.Text = Text1 & CStr(Index)
  End If
     If Index = 0 And Left(Text1, 2) <> "." Then
     Text1 = Mid(Text1, 2)
     End If
     
     
        
  
End Sub

Private Sub Command2_Click(Index As Integer)
  a = Val(Text1.Text)
  b = Index
  Text1.Text = ""
End Sub

Private Sub Command3_Click(Index As Integer)
Text1.Text = ""
a = 0
End Sub

Private Sub Command5_Click()
 c = Val(Text1.Text)
 Select Case b
   Case 0
        Text1.Text = Str(a + c)
  Case 1
        Text1.Text = Str(a - c)
Case 2
        Text1.Text = Str(a * c)
 Case 3
        If c <> 0 Then
            Text1.Text = Str(a / c)
        Else
           Text1.Text = "除数为0"
        End If
End Select
        
    
End Sub

Private Sub Command6_Click()
End
End Sub