📄 form1.frm
字号:
VERSION 5.00
Begin VB.Form Form1
Caption = "计算器"
ClientHeight = 3000
ClientLeft = 60
ClientTop = 345
ClientWidth = 3195
LinkTopic = "Form1"
ScaleHeight = 3000
ScaleWidth = 3195
StartUpPosition = 3 'Windows Default
Begin VB.CommandButton cmdPercent
Caption = "%"
Height = 480
Left = 2520
TabIndex = 18
Top = 2340
Width = 480
End
Begin VB.CommandButton cmdOperator
Caption = "="
Height = 480
Index = 4
Left = 1935
TabIndex = 17
Top = 2340
Width = 480
End
Begin VB.CommandButton cmdDecimal
Caption = "."
Height = 480
Left = 1200
TabIndex = 16
Top = 2340
Width = 480
End
Begin VB.CommandButton cmdNumber
Caption = "0"
Height = 480
Index = 0
Left = 0
TabIndex = 15
Top = 2340
Width = 1080
End
Begin VB.CommandButton cmdOperator
Caption = "/"
Height = 480
Index = 0
Left = 2520
TabIndex = 14
Top = 1740
Width = 480
End
Begin VB.CommandButton cmdOperator
Caption = "X"
Height = 480
Index = 2
Left = 1920
TabIndex = 13
Top = 1740
Width = 480
End
Begin VB.CommandButton cmdNumber
Caption = "3"
Height = 480
Index = 3
Left = 1215
TabIndex = 12
Top = 1710
Width = 480
End
Begin VB.CommandButton cmdNumber
Caption = "2"
Height = 480
Index = 2
Left = 585
TabIndex = 11
Top = 1740
Width = 480
End
Begin VB.CommandButton cmdNumber
Caption = "1"
Height = 480
Index = 1
Left = 0
TabIndex = 10
Top = 1740
Width = 480
End
Begin VB.CommandButton cmdOperator
Caption = "-"
Height = 480
Index = 3
Left = 2535
TabIndex = 9
Top = 1140
Width = 480
End
Begin VB.CommandButton cmdOperator
Caption = "+"
Height = 480
Index = 1
Left = 1920
TabIndex = 8
Top = 1140
Width = 480
End
Begin VB.CommandButton cmdNumber
Caption = "6"
Height = 480
Index = 6
Left = 1185
TabIndex = 7
Top = 1155
Width = 480
End
Begin VB.CommandButton cmdNumber
Caption = "5"
Height = 480
Index = 5
Left = 600
TabIndex = 6
Top = 1140
Width = 480
End
Begin VB.CommandButton cmdNumber
Caption = "4"
Height = 480
Index = 4
Left = 0
TabIndex = 5
Top = 1140
Width = 480
End
Begin VB.CommandButton cmdCancelEntry
Caption = "CE"
Height = 480
Left = 2535
TabIndex = 4
Top = 540
Width = 480
End
Begin VB.CommandButton cmdCancel
Caption = "C"
Height = 480
Left = 1920
TabIndex = 3
Top = 540
Width = 480
End
Begin VB.CommandButton cmdNumber
Caption = "9"
Height = 480
Index = 9
Left = 1200
TabIndex = 2
Top = 525
Width = 480
End
Begin VB.CommandButton cmdNumber
Caption = "8"
Height = 480
Index = 8
Left = 600
TabIndex = 1
Top = 540
Width = 480
End
Begin VB.CommandButton cmdNumber
Caption = "7"
Height = 480
Index = 7
Left = 0
TabIndex = 0
Top = 525
Width = 480
End
Begin VB.Label lblDisplay
Alignment = 1 'Right Justify
BackColor = &H0000FFFF&
BorderStyle = 1 'Fixed Single
Caption = "0."
BeginProperty Font
Name = "宋体"
Size = 12
Charset = 134
Weight = 700
Underline = 0 'False
Italic = 0 'False
Strikethrough = 0 'False
EndProperty
ForeColor = &H00000000&
Height = 375
Left = 60
TabIndex = 19
Top = 0
Width = 3000
End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
' ------------------------------------------------------------------------
' 版权所有 (C) 1994 Microsoft Corporation
'
' 您可以免费以任何方式使用、修改、复制并分发您认为有用的
' 示例应用程序文件 (或任何修改过的版本)。Microsoft 对任何
' 示例应用程序文件不做任何保证，不负任何责任和义务。
' ------------------------------------------------------------------------
Option Explicit
Dim Op1, Op2 ' 预先输入操作数。
Dim DecimalFlag As Integer ' 小数点存在吗？
Dim NumOps As Integer ' 操作数个数。
Dim LastInput ' 指示上一次按键事件的类型。
Dim OpFlag ' 指示未完成的操作。
Dim TempReadout
' C (取消) 按钮的 Click 事件过程
' 重新设置显示并初始化变量。
Private Sub cmdCancel_Click()
lblDisplay = Format(0, "0.")
Op1 = 0
Op2 = 0
Form_Load
End Sub
' CE (取消输入) 按钮的 Click 事件过程。
Private Sub cmdCancelEntry_Click()
lblDisplay = Format(0, "0.")
DecimalFlag = False
LastInput = "CE"
End Sub
' 小数点 (.) 按钮的 Click 事件过程
' 如果上一次按键为运算符，初始化 lblDisplay 为 "0."；
' 否则显示时追加一个小数点。
Private Sub cmdDecimal_Click()
If LastInput = "NEG" Then
lblDisplay = Format(0, "-0.")
ElseIf LastInput <> "NUMS" Then
lblDisplay = Format(0, "0.")
End If
DecimalFlag = True
LastInput = "NUMS"
End Sub
' 窗体的初始化过程
' 设置所有变量为其初始值。
Private Sub Form_Load()
DecimalFlag = False
NumOps = 0
LastInput = "NONE"
OpFlag = " "
lblDisplay = Format(0, "0.")
'cmdDecimal.Caption = Format(0, ".")
End Sub
' 数字键 (0-9) 的 Click 事件过程
' 向显示中的数追加新数。
Private Sub cmdNumber_Click(Index As Integer)
If LastInput <> "NUMS" Then
lblDisplay = Format(0, ".")
DecimalFlag = False
End If
If DecimalFlag Then
lblDisplay = lblDisplay + cmdNumber(Index).Caption
Else
lblDisplay = Left(lblDisplay, InStr(lblDisplay, Format(0, ".")) - 1) + cmdNumber(Index).Caption + Format(0, ".")
End If
If LastInput = "NEG" Then lblDisplay = "-" & lblDisplay
LastInput = "NUMS"
End Sub
' 运算符 (+, -, x, /, =) 的 Click 事件过程
' 如果接下来的按键是数字键，增加 NumOps。
' 如果有一个操作数，则设置 Op1。
' 如果有两个操作数，则将 Op1 设置为 Op1 与
' 当前输入字符串的运算结果，并显示结果。
Private Sub cmdOperator_Click(Index As Integer)
TempReadout = lblDisplay
If LastInput = "NUMS" Then
NumOps = NumOps + 1
End If
Select Case NumOps
Case 0
If cmdOperator(Index).Caption = "-" And LastInput <> "NEG" Then
lblDisplay = "-" & lblDisplay
LastInput = "NEG"
End If
Case 1
Op1 = lblDisplay
If cmdOperator(Index).Caption = "-" And LastInput <> "NUMS" And OpFlag <> "=" Then
lblDisplay = "-"
LastInput = "NEG"
End If
Case 2
Op2 = TempReadout
Select Case OpFlag
Case "+"
Op1 = CDbl(Op1) + CDbl(Op2)
Case "-"
Op1 = CDbl(Op1) - CDbl(Op2)
Case "X"
Op1 = CDbl(Op1) * CDbl(Op2)
Case "/"
If Op2 = 0 Then
MsgBox "除数不能为零", 48, "计算器"
Else
Op1 = CDbl(Op1) / CDbl(Op2)
End If
Case "="
Op1 = CDbl(Op2)
Case "%"
Op1 = CDbl(Op1) * CDbl(Op2)
End Select
lblDisplay = Op1
NumOps = 1
End Select
If LastInput <> "NEG" Then
LastInput = "OPS"
OpFlag = cmdOperator(Index).Caption
End If
End Sub
' 百分比键 (%) 的 Click 事件过程
' 计算并显示第一个操作数的百分数。
Private Sub cmdPercent_Click()
lblDisplay = lblDisplay / 100
LastInput = "Ops"
OpFlag = "%"
NumOps = NumOps + 1
DecimalFlag = True
End Sub
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