计算器vb源代码.doc

计算器vb源代码.txt性格本身没有好坏，乐观和悲观对这个世界都有贡献，前者发明了飞机，后者发明了降落伞。完全版的前后台代码.请把下面的保存为 form1.frm VERSION 5.00 Begin VB.Form Calculator BorderStyle = 1 Fixed Single Caption = 计算器 ClientHeight = 2970 ClientLeft = 2580 ClientTop = 1485 ClientWidth = 3270 ClipControls = 0 False BeginProperty Font Name = System Size = 9.75 Charset = 0 Weight = 700 Underline = 0 False Italic = 0 False Strikethrough = 0 False EndProperty Icon = CALC.frx:0000 LinkMode = 1 Source LinkTopic = Form1 MaxButton = 0 False PaletteMode = 1 UseZOrder ScaleHeight = 2970 ScaleWidth = 3270 WhatsThisHelp = -1 True Begin VB.CommandButton Number Caption = 7 Height = 480 Index = 7 Left = 120 TabIndex = 7 Top = 600 Width = 480 End Begin VB.CommandButton Number Caption = 8 Height = 480 Index = 8 Left = 720 TabIndex = 8 Top = 600 Width = 480 End Begin VB.CommandButton Number Caption = 9 Height = 480 Index = 9 Left = 1320 TabIndex = 9 Top = 600 Width = 480 End Begin VB.CommandButton Cancel Caption = C Height = 480 Left = 2040 TabIndex = 10 Top = 600 Width = 480 End Begin VB.CommandButton CancelEntry Caption = CE Height = 480 Left = 2640 TabIndex = 11 Top = 600 Width = 480 End Begin VB.CommandButton Number Caption = 4 Height = 480 Index = 4 Left = 120 TabIndex = 4 Top = 1200 Width = 480 End Begin VB.CommandButton Number Caption = 5 Height = 480 Index = 5 Left = 720 TabIndex = 5 Top = 1200 Width = 480 End Begin VB.CommandButton Number Caption = 6 Height = 480 Index = 6 Left = 1320 TabIndex = 6 Top = 1200 Width = 480 End Begin VB.CommandButton Operator Caption = + Height = 480 Index = 1 Left = 2040 TabIndex = 12 Top = 1200 Width = 480 End Begin VB.CommandButton Operator Caption = - Height = 480 Index = 3 Left = 2640 TabIndex = 13 Top = 1200 Width = 480 End Begin VB.CommandButton Number Caption = 1 Height = 480 Index = 1 Left = 120 TabIndex = 1 Top = 1800 Width = 480 End Begin VB.CommandButton Number Caption = 2 Height = 480 Index = 2 Left = 720 TabIndex = 2 Top = 1800 Width = 480 End Begin VB.CommandButton Number Caption = 3 Height = 480 Index = 3 Left = 1320 TabIndex = 3 Top = 1800 Width = 480 End Begin VB.CommandButton Operator Caption = X Height = 480 Index = 2 Left = 2040 TabIndex = 14 Top = 1800 Width = 480 End Begin VB.CommandButton Operator Caption = / Height = 480 Index = 0 Left = 2640 TabIndex = 15 Top = 1800 Width = 480 End Begin VB.CommandButton Number Caption = 0 Height = 480 Index = 0 Left = 120 TabIndex = 0 Top = 2400 Width = 1080 End Begin VB.CommandButton Decimal Caption = . Height = 480 Left = 1320 TabIndex = 18 Top = 2400 Width = 480 End Begin VB.CommandButton Operator Caption = = Height = 480 Index = 4 Left = 2040 TabIndex = 16 Top = 2400 Width = 480 End Begin VB.CommandButton Percent Caption = % Height = 480 Left = 2640 TabIndex = 17 Top = 2400 Width = 480 End Begin VB.Label Readout Alignment = 1 Right Justify BackColor = &H0000FFFF& BorderStyle = 1 Fixed Single Caption = 0. BeginProperty Font Name = MS Sans Serif Size = 12 Charset = 0 Weight = 700 Underline = 0 False Italic = 0 False Strikethrough = 0 False EndProperty ForeColor = &H00000000& Height = 375 Left = 120 TabIndex = 19 Top = 105 Width = 3000 End End Attribute VB_Name = Calculator 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 前面输入的操作数 Dim DecimalFlag As Integer 小数点仍然存在吗？ 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 Cancel_Click() Readout = 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 CancelEntry_Click() Readout = 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 readout 为 0.； 否则显示时追加一个小数点 Private Sub Decimal_Click() If LastInput = NEG Then Readout = Format(0, -0.) ElseIf LastInput NUMS Then Readout = 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 = Readout = Format(0, 0.) Decimal.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 Number_Click(Index As Integer) If LastInput NUMS Then Readout = Format(0, .) DecimalFlag = False End If If DecimalFlag Then Readout = Readout + Number(Index).Caption Else Readout = Left(Readout, InStr(Readout, Format(0, .) - 1) + Number(Index).Caption + Format(0, .) End If If LastInput = NEG Then Readout = - & Readout 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 Operator_Click(Index As Integer) TempReadout = Readout If LastInput = NUMS Then NumOps = NumOps + 1 End If Select Case NumOps Case 0 If Operator(Index).Caption = - And LastInput NEG Then Readout = - & Readout LastInput = NEG End If Case 1 Op1 = Readout If Operator(Index).Caption = - And LastInput NUMS And OpFlag = Then Readout = - 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 0, 48, 计算器 Else Op1 = CDbl(Op1) / CDbl(Op2) End If Case = Op1 = CDbl(Op2) Case % Op1 = CDbl(Op1) * CDbl(Op2) End Select