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用VB编写一个简单计算器

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VB简易计算器代码

VB简易计算器代码

VB简易计算器代码下面是一个简单的VB计算器代码，用于执行基本的加、减、乘、除运算。

```vbOption Strict OnPublic Class CalculatorPrivate Sub btnAdd_Click(sender As Object, e As EventArgs) Handles btnAdd.ClickDim num1 As Double = CDbl(txtNum1.Text)Dim num2 As Double = CDbl(txtNum2.Text)Dim result As Double = num1 + num2txtResult.Text = result.ToStringEnd SubPrivate Sub btnSubtract_Click(sender As Object, e As EventArgs) Handles btnSubtract.ClickDim num1 As Double = CDbl(txtNum1.Text)Dim num2 As Double = CDbl(txtNum2.Text)Dim result As Double = num1 - num2txtResult.Text = result.ToStringPrivate Sub btnMultiply_Click(sender As Object, e As EventArgs) Handles btnMultiply.ClickDim num1 As Double = CDbl(txtNum1.Text)Dim num2 As Double = CDbl(txtNum2.Text)Dim result As Double = num1 * num2txtResult.Text = result.ToStringEnd SubPrivate Sub btnDivide_Click(sender As Object, e As EventArgs) Handles btnDivide.ClickDim num1 As Double = CDbl(txtNum1.Text)Dim num2 As Double = CDbl(txtNum2.Text)If num2 = 0 ThenMessageBox.Show("除数不能为0！", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error)ElseDim result As Double = num1 / num2txtResult.Text = result.ToStringEnd IfEnd Sub```此代码创建了一个简单的窗体应用程序，其中包含两个文本框用于输入两个数字，四个按钮用于执行不同的计算操作，以及一个文本框用于显示结果。

VB简单计算器(截图附代码)

VB简单计算器(截图附代码)

VB程序简单计算器最近学完VB，感觉很好，写了个计算器程序，虽然花了不少时间，可也着实高兴。

其中遇到很多问题，最终也在各种资料中得到解决。

现在附上截图和全部代码，希望和大家交流一下，相互学习。

也希望能帮助到准备做计算器的同学。

计算器最终执行文件图标：计算器包括三个窗体（form）：主页面form1：其中的“欢迎各位到此一游”是闪烁效果，呵呵，是自己想着无聊，就想出这么个玩意。

与计算器计算功能无关。

具体实现看下来代码。

Form1的实现代码：Public haha As BooleanPrivate Sub Command1_Click()Dim a As Integera = MsgBox("亲爱的你，真的想要退出本系统吗？", _vbYesNo + vbInformation + vbDefaultButton1, "退出系统前的询问撒(⊙o⊙)")If a = 6 Then '表示当选择“是”的时候的返回值EndEnd IfEnd SubPrivate Sub Command2_Click()Me.HideForm2.ShowEnd SubPrivate Sub Command3_Click()Me.HideForm3.ShowEnd SubPrivate Sub Form_Load()haha = FalseEnd SubPrivate Sub Timer1_Timer()haha = Not hahaIf haha ThenLabel2.ForeColor = &HFF00FFElseLabel2.ForeColor = vbWhiteEnd IfEnd Sub有些像图像等一些可见的控件属性就没在代码里写了，直接在属性里设置了。

页面（form2）：此页面将鼠标点上去，还有意想不到的效果喲。

全部代码为：Dim isFocus1, isFocus2 As BooleanPrivate Sub Command1_Click()If isFocus1 Then '判断焦点在那个文本框中，便于实现按钮输入Text1.Text = Text1.Text & 0End IfIf isFocus2 ThenText2.Text = Text2.Text & 0End IfEnd SubPrivate Sub Command10_Click() If isFocus1 ThenText1.Text = Text1.Text & 9 End IfIf isFocus2 ThenText2.Text = Text2.Text & 9 End IfEnd SubPrivate Sub Command11_Click() If isFocus1 ThenText1.Text = Text1.Text & "." End IfIf isFocus2 ThenText2.Text = Text2.Text & "." End IfEnd SubPrivate Sub Command12_Click() If isFocus1 ThenText1.Text = -Val(Text1.Text)End IfIf isFocus2 ThenText2.Text = -Val(Text2.Text)End IfEnd SubPrivate Sub Command13_Click()Dim a As Integera = Val(Text1.Text) + Val(Text2.Text)Text3.Text = Val(Text1.Text) & "+" & Val(Text2.Text) & "=" & aIf Text1.Text = "" Or Text2.Text = "" ThenMsgBox "哼哼，双目运算一定要是两个数喔" & vbCrLf & vbCrLf & _ "不用说，补上去是必须的撒", vbCritical, "温馨小提醒(*^__^*)" End IfEnd SubPrivate Sub Command14_Click()Dim a As Integera = Val(Text1.Text) - Val(Text2.Text)Text3.Text = Val(Text1.Text) & "-" & Val(Text2.Text) & "=" & aIf Text1.Text = "" Or Text2.Text = "" ThenMsgBox "哼哼，双目运算一定要是两个数喔" & vbCrLf & vbCrLf & _ "不用说，补上去是必须的撒", vbCritical, "温馨小提醒(*^__^*)" End IfEnd SubPrivate Sub Command15_Click()a = Val(Text1.Text) * Val(Text2.Text)Text3.Text = Val(Text1.Text) & "×" & Val(Text2.Text) & "=" & aIf Text1.Text = "" Or Text2.Text = "" ThenMsgBox "哼哼，双目运算一定要是两个数喔" & vbCrLf & vbCrLf & _ "不用说，补上去是必须的撒", vbCritical, "温馨小提醒(*^__^*)" End IfEnd SubPrivate Sub Command16_Click() '除法的特殊性，除数不能为零If Val(Text2.Text) Thena = Val(Text1.Text) / Val(Text2.Text)Text3.Text = Val(Text1.Text) & "÷" & Val(Text2.Text) & "=" & aIf Text1.Text = "" Or Text2.Text = "" ThenMsgBox "哼哼，双目运算一定要是两个数喔" & vbCrLf & vbCrLf & _ "不用说，补上去是必须的撒", vbCritical, "温馨小提醒(*^__^*)" End IfElseText3.Text = "无穷大∞"MsgBox "亲，除数不可以为零的哟！", vbInformation, "矮油，不得了嘞(*^__^*)"Text2.Text = ""Text2.SetFocusEnd IfEnd SubPrivate Sub Command17_Click() '实现清零，并将焦点给文本框1Text1.Text = ""Text2.Text = ""Text3.Text = ""Text1.SetFocusEnd SubPrivate Sub Command18_Click()Me.Hide '进入计算器1Form1.ShowEnd SubPrivate Sub Command2_Click() If isFocus1 ThenText1.Text = Text1.Text & 1 End IfIf isFocus2 ThenText2.Text = Text2.Text & 1 End IfEnd SubPrivate Sub Command3_Click() If isFocus1 ThenText1.Text = Text1.Text & 2 End IfIf isFocus2 ThenText2.Text = Text2.Text & 2 End IfEnd SubPrivate Sub Command4_Click() If isFocus1 ThenText1.Text = Text1.Text & 3 End IfIf isFocus2 ThenText2.Text = Text2.Text & 3 End IfEnd SubPrivate Sub Command5_Click() If isFocus1 ThenText1.Text = Text1.Text & 4 End IfIf isFocus2 ThenText2.Text = Text2.Text & 4 End IfEnd SubPrivate Sub Command6_Click() If isFocus1 ThenText1.Text = Text1.Text & 5 End IfIf isFocus2 ThenText2.Text = Text2.Text & 5 End IfEnd SubPrivate Sub Command7_Click() If isFocus1 ThenText1.Text = Text1.Text & 6 End IfIf isFocus2 ThenText2.Text = Text2.Text & 6 End IfEnd SubPrivate Sub Command8_Click() If isFocus1 ThenText1.Text = Text1.Text & 7 End IfIf isFocus2 ThenText2.Text = Text2.Text & 7 End IfEnd SubPrivate Sub Command9_Click() If isFocus1 ThenText1.Text = Text1.Text & 8End IfIf isFocus2 ThenText2.Text = Text2.Text & 8End IfEnd SubPrivate Sub Form_Load()isFocus1 = False: isFocus2 = FalseEnd SubPrivate Sub Form_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)Label4.ForeColor = vbBlackLabel4.FontUnderline = FalseLabel4.FontBold = FalseEnd SubPrivate Sub Label4_Click()Form3.ShowEnd SubPrivate Sub Label4_MouseMove(Button As Integer, Shift As Integer, X AsSingle, Y As Single)Label4.ForeColor = vbGreen Label4.FontUnderline = True Label4.FontBold = True End SubPrivate Sub Text1_GotFocus() isFocus1 = TrueisFocus2 = FalseEnd SubPrivate Sub Text2_GotFocus() isFocus2 = TrueisFocus1 = FalseEnd Sub页面（form3）：这里面的亮点自己找哦。

VB简易计算器代码

VB简易计算器代码

VB简易计算器代码以下是一个简单的VB计算器代码：```Public Class Form1Dim firstNum As Double ' 第一个数字Dim secondNum As Double ' 第二个数字Dim operation As Integer ' 1-加法，2-减法，3-乘法，4-除法Private Sub Button0_Click(sender As Object, e As EventArgs) Handles Button0.ClickTextBoxResult.Text = TextBoxResult.Text & "0"End SubPrivate Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.ClickTextBoxResult.Text = TextBoxResult.Text & "1"End SubPrivate Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.ClickTextBoxResult.Text = TextBoxResult.Text & "2"End SubHandles Button3.ClickTextBoxResult.Text = TextBoxResult.Text & "3"End SubPrivate Sub Button4_Click(sender As Object, e As EventArgs) Handles Button4.ClickTextBoxResult.Text = TextBoxResult.Text & "4"End SubPrivate Sub Button5_Click(sender As Object, e As EventArgs) Handles Button5.ClickTextBoxResult.Text = TextBoxResult.Text & "5"End SubPrivate Sub Button6_Click(sender As Object, e As EventArgs) Handles Button6.ClickTextBoxResult.Text = TextBoxResult.Text & "6"End SubPrivate Sub Button7_Click(sender As Object, e As EventArgs) Handles Button7.ClickTextBoxResult.Text = TextBoxResult.Text & "7"End SubHandles Button8.ClickTextBoxResult.Text = TextBoxResult.Text & "8"End SubPrivate Sub Button9_Click(sender As Object, e As EventArgs) Handles Button9.ClickTextBoxResult.Text = TextBoxResult.Text & "9"End SubPrivate Sub ButtonDot_Click(sender As Object, e As EventArgs) Handles ButtonDot.ClickIf Not TextBoxResult.Text.Contains(".") ThenTextBoxResult.Text = TextBoxResult.Text & "."End IfEnd SubPrivate Sub ButtonAdd_Click(sender As Object, e As EventArgs) Handles ButtonAdd.ClickfirstNum = Double.Parse(TextBoxResult.Text)TextBoxResult.Text = ""operation = 1End SubPrivate Sub ButtonSubtract_Click(sender As Object, e As EventArgs) Handles ButtonSubtract.ClickfirstNum = Double.Parse(TextBoxResult.Text)TextBoxResult.Text = ""operation = 2End SubPrivate Sub ButtonMultiply_Click(sender As Object, e As EventArgs) Handles ButtonMultiply.ClickfirstNum = Double.Parse(TextBoxResult.Text)TextBoxResult.Text = ""operation = 3End SubPrivate Sub ButtonDivide_Click(sender As Object, e As EventArgs) Handles ButtonDivide.ClickfirstNum = Double.Parse(TextBoxResult.Text)TextBoxResult.Text = ""operation = 4End SubPrivate Sub ButtonClear_Click(sender As Object, e As EventArgs) Handles ButtonClear.ClickTextBoxResult.Text = ""End SubPrivate Sub ButtonEquals_Click(sender As Object, e As EventArgs) Handles ButtonEquals.ClickDim result As DoublesecondNum = Double.Parse(TextBoxResult.Text)Select Case operationCase 1result = firstNum + secondNumCase 2result = firstNum - secondNumCase 3result = firstNum * secondNumCase 4result = firstNum / secondNumEnd SelectTextBoxResult.Text = result.ToStringEnd SubEnd Class```这个计算器包括数字按钮0-9、小数点按钮、加法、减法、乘法、除法和等于按钮。

简单的VB计算器代码

简单的VB计算器代码

简单的VB计算器代码：'变量定义说明部分Dim x1 As Single, x2 As SingleDim Y As SingleDim n As Integer '标记使用运算符类型'接收数据输入Private Sub Command1_Click(Index As Integer)Text1.Text = Text1.Text + CStr(Index)End Sub'按运算符时的处理方法Private Sub Command3_Click(Index As Integer)x1 = Val(Text1.Text)Text1.Text = ""n = IndexEnd Sub'输入小数点时的处理办法Private Sub Command2_Click()Text1.Text = Text1.Text + "."End Sub'单击退格按钮时的处理方法Private Sub Command4_Click()Text1.Text = Mid(Text1.Text, 1, Len(Text1.Text) - 1) End Sub'单击清除按钮时的处理方法Private Sub Command5_Click() x1 = 0: x2 = 0: Y = 0Text1.Text = ""End Sub'单击退出按钮时的处理方法Private Sub Command6_Click() Unload MeEnd Sub'单击"="按钮时的处理方法Private Sub Command7_Click() x2 = Val(Text1.Text)On Error GoTo err1Select Case nCase 0Y = x1 + x2Case 1Y = x1 - x2Case 2Y = x1 * x2Case 3Y = x1 / x2End SelectText1.Text = CStr(Y)Exit Suberr1:MsgBox "您输入的数据有误，请重新输入！", vbOKOnly + vbCritical, "错误！"Text1.Text = ""x1 = 0: x2 = 0: Y = 0Exit SubEnd Sub运行界面如下：。

VB编写简易计算器(附图)

VB编写简易计算器(附图)

For personal use only in study and research;not for commercial use用VB6.0编写简易计算器效果图：废话不多说，直接上步骤一、创建控件组1、创建控件组的方法??首先创建一个命令按钮，调整其大小（觉得合适就行），名称为Command1，Caption 属性为数字 0 ；然后进行“复制”和“粘贴”，当选择“粘贴”时，出现对话框提示已有一个同名控件，询问是否创建控件组，选择“是”后，即创建了一个名为“Command”的控件组。

这时，第一个按钮的Index属性值默认为“0”，第二个的Index属性值自动设为“1”，并且大小与第一个按钮相同，只需修改其 Caption 属性为数字“1”并将其拖至合适位置即可。

此后继续使用“粘贴”的方法建立其他控件组中其余按钮，共20个按钮，每建立一个，就将它拖到合适处，并修改相应的Caption属性值。

2、各控件组其属性设置如下：二、编写代码Dim s1 As Single, s2 As Single, ysf As String'定义两个单精度数变量用与存放参与运算的数,一个字符型存放运算符Private Sub Command1_Click(Index As Integer)Text1.Text = Text1.Text & Command1(Index).Caption'将command1的单击事件与文本框显示的内容连接End SubPrivate Sub Command2_Click()Text1.Text = Text1.Text + "."If (InStr(Text1.Text, ".") = 1) Then'第一位不能为小数Text1.Text = ""End IfIf InStr(Text1.Text, ".") < Len(Text1.Text) Then '防止出现两个小数点Text1.Text = Left(Text1.Text, Len(Text1.Text) - 1)End IfEnd SubPrivate Sub Command3_Click()s2 = Val(Text1.Text) '开始加减乘除运算Select Case ysfCase "+"Text1.Text = s1 + s2Case "-"Text1.Text = s1 - s2Case "*"Text1.Text = s1 * s2Case "/"If s2 = 0 ThenMsgBox "分母不能为零!"Text1.Text = ""ElseText1.Text = s1 / s2End IfEnd SelectText1 = IIf(Left(Text1.Text, 1) = ".", 0 & Text1.Text, Text1.Text) '这个很关键，如果没有这个的话，得出小于1的小数前面没有0End SubPrivate Sub Command4_Click()If Text1.Text = "" Then '文本为空就结束Exit SubEnd IfText1.Text = Left(Text1.Text, Len(Text1.Text) - 1) '文本退一格End SubPrivate Sub Command5_Click()Text1.Text = "" '清除当前框内文本End SubPrivate Sub Command6_Click(Index As Integer)s1 = Val(Text1.Text) '将s1隐藏起来ysf = Command6(Index).CaptionText1.Text = ""End SubPrivate Sub Command7_Click()If Left(Text1.Text, 1) <> "-" Then '判断作为负数Text1.Text = "-" & Text1.TextElseText1.Text = Right(Text1.Text, Len(Text1.Text) - 1)End IfEnd SubPrivate Sub Command8_Click()Text1.Text = Text1.Text * Text1.Text '平方End Sub各位朋友，可以将红色代码复制到相应位置，不清楚的可以全选复制，但是一定要按照我的步骤和给的名称来哦！还可以再添加按钮Private Sub Command9_Click() '这是退出代码EndEnd Sub三、测试，成功的话给个好评哦！谢谢各位下载与支持！这个可以编写作为作业哦！仅供个人参考仅供个人用于学习、研究；不得用于商业用途。

VB编写简单计算器程序

VB编写简单计算器程序

Option ExplicitDim LastInput As String * 3 '记录上次按下的按键Dim Num1 As Double '第一个操作数Dim Num2 As Double '第二个操作数Dim OptType As Integer '按下哪一个操作符Dim Result As Double '表示运算结果Dim shuzhi As Integer '表示当前采用的shuzhiDim FirstNum As Boolean '是否是第一个操作数Sub keyp(keynum As Integer)Dim CHAR As String * 1CHAR = Chr(keynum)If CHAR = "+" Or keynum = 43 Then Command5(0).Value = TrueIf CHAR = "-" Or keynum = 45 Then Command5(1).Value = TrueIf CHAR = "*" Or keynum = 42 Then Command5(2).Value = TrueIf CHAR = "/" Or keynum = 47 Then Command5(3).Value = TrueIf shuzhi = 2 And CHAR >= "2" And CHAR <= "9" Thenkeynum = 0Exit SubEnd IfIf keynum >= 48 And keynum <= 57 Then Command1(keynum - 48).Value = True If keynum = 46 Then Command2.Value = TrueIf UCase(CHAR) = "C" Then Command3.Value = TrueIf keynum = 27 Then Command4.Value = TrueIf keynum = 61 Then Command6.Value = Truekeynum = 0End SubFunction angle(ByVal j1 As Integer) As Singleangle = j1If Option1.Value Then angle = j1 * 3.14 / 180End FunctionFunction ArcSin(ByVal Num As Single) As SingleIf Num = 1 ThenArcSin = 3.1415926 / 2ElseIf Num = -1 ThenArcSin = 3.1415926 * 3 / 2ElseArcSin = Atn(Num / Sqr(-Num * Num + 1))End IfIf Option1.Value Then ArcSin = ArcSin * 180 / 3.1415926End FunctionFunction ArcCos(ByVal Num As Single) As SingleIf Num = 1 ThenArcCos = 0ElseIf Num = -1 ThenArcCos = 3.1415926ElseArcCos = Atn(-Num / Sqr(-Num * Num + 1)) + 2 * Atn(1)End IfIf Option1.Value Then ArcCos = ArcCos * 180 / 3.1415926 End FunctionFunction jiecheng(ByVal n As Integer) As SingleDim COUNT As Integerjiecheng = 1For COUNT = 1 To njiecheng = jiecheng * COUNTNextEnd FunctionFunction n10to2(ByVal Number As Single) As SingleDim IntN As Long 'Number的整数部分Dim FracN As Single 'Number的小数部分Dim ModN As Integer '整数部分换算时，记录余数Dim RltN As String '换算结果Dim i As IntegerIf InStr(Number, "e") > 0 Or InStr(Number, "E") > 0 Then MsgBox "不能转换以科学记数法表示的数据！"Exit FunctionEnd IfModN = 0'Number = Val(Text1.Text)IntN = Int(Number)FracN = Number - IntN'以下代码用于将十进制的整数部分换算为二进制Do While IntN > 0ModN = IntN Mod 2IntN = IntN \ 2RltN = ModN & RltNLoopRltN = RltN & "."i = 1'以下代码用于将十进制的小数部分换算为二进制Do While i <= 7 Or FracN <> 0FracN = FracN * 2If FracN >= 1 ThenFracN = FracN - 1RltN = RltN & "1"ElseRltN = RltN & "0"End Ifi = i + 1Loopn10to2 = RltN'Option3.Value = TrueEnd FunctionFunction n2to10(ByVal Number As Double) As SingleDim i As Integer, j As IntegerDim IntN As Long, FracN As SingleDim RltN As SingleDim POS As Integer '记录小数点位置If InStr(Number, "e") > 0 Or InStr(Number, "E") > 0 ThenMsgBox "不能转换以科学记数法表示的数据！"Exit FunctionEnd IfOn Error GoTo ErrIntN = Int(Number)FracN = Number - IntNDo While IntN > 0 '换算整数部分RltN = RltN + (IntN Mod 10) * 2 ^ jj = j + 1IntN = IntN \ 10LoopPOS = InStr(1, Str(FracN), ".")j = -1For i = POS + 1 To Len(Str(FracN)) '换算小数部分RltN = RltN + 2 ^ j * Val(Mid(Str(FracN), i, 1))j = j - 1Next in2to10 = RltN'Option4.Value = TrueExit FunctionErr:Text1.Text = "数据太大，溢出！"End FunctionPrivate Sub Command1_Click(Index As Integer)'当按下数字键（0-9）时，向文本框尾部追加数据'并通过变量LastInput记录上次按键为数字键If Len(Text1.Text) > 16 Then Exit SubIf Text1.Text = "0" Or LastInput = "Eqv" Then Text1.Text = ""Text1.Text = Text1.Text & Index '追加数据LastInput = "Num"Command1(0).SetFocusEnd SubPrivate Sub Command1_KeyPress(Index As Integer, KeyAscii As Integer) Call keyp(KeyAscii)End SubPrivate Sub Command2_Click()'按下小数点按钮的处理过程'如果数据位数超出范围，或数据中已包含小数点，退出本过程If Len(Text1.Text) > 16 Or InStr(1, Text1.Text, ".") > 0 _And LastInput <> "Eqv" Then Exit Sub'如果以"."开始输入新数据，在"."前加"0"；'如果在数据输入过程中按下"."，直接将"."追加在数据尾部If LastInput = "Opt" Or LastInput = "Eqv" Or LastInput = "Neg" Then Text1.Text = Text1.Text + "0."ElseText1.Text = Text1.Text + "."End IfLastInput = "Num"Command1(0).SetFocusEnd SubPrivate Sub Command3_Click()'按下"C"(取消) 按钮的Click 事件过程'重新设置并初始化变量。

VB写简易计算器附图

VB写简易计算器附图

用V B6.0编写简易计算器效果图：废话不多说，直接上步骤一、创建控件组1、创建控件组的方法??首先创建一个命令按钮，调整其大小（觉得合适就行），名称为Command1，Caption属性为数字 0 ；然后进行“复制”和“粘贴”，当选择“粘贴”时，出现对话框提示已有一个同名控件，询问是否创建控件组，选择“是”后，即创建了一个名为“Command”的控件组。

这时，第一个按钮的Index属性值默认为“0”，第二个的Index属性值自动设为“1”，并且大小与第一个按钮相同，只需修改其 Caption 属性为数字“1”并将其拖至合适位置即可。

此后继续使用“粘贴”的方法建立其他控件组中其余按钮，共20个按钮，每建立一个，就将它拖到合适处，并修改相应的Caption属性值。

二、编写代码Dim s1 As Single, s2 As Single, ysf As String'定义两个单精度数变量用与存放参与运算的数,一个字符型存放运算符Private Sub Command1_Click(Index As Integer)Text1.Text = Text1.Text & Command1(Index).Caption'将command1的单击事件与文本框显示的内容连接End SubPrivate Sub Command2_Click()Text1.Text = Text1.Text + "."If (InStr(Text1.Text, ".") = 1) Then'第一位不能为小数Text1.Text = ""End IfIf InStr(Text1.Text, ".") < Len(Text1.Text) Then '防止出现两个小数点Text1.Text = Left(Text1.Text, Len(Text1.Text) - 1)End IfEnd SubPrivate Sub Command3_Click()s2 = Val(Text1.Text) '开始加减乘除运算Select Case ysfCase "+"Text1.Text = s1 + s2Case "-"Text1.Text = s1 - s2Case "*"Text1.Text = s1 * s2Case "/"If s2 = 0 ThenMsgBox "分母不能为零!"Text1.Text = ""ElseText1.Text = s1 / s2End IfEnd SelectText1 = IIf(Left(Text1.Text, 1) = ".", 0 & Text1.Text, Text1.Text) '这个很关键，如果没有这个的话，得出小于1的小数前面没有0End SubPrivate Sub Command4_Click()If Text1.Text = "" Then '文本为空就结束Exit SubEnd IfText1.Text = Left(Text1.Text, Len(Text1.Text) - 1) '文本退一格End SubPrivate Sub Command5_Click()Text1.Text = "" '清除当前框内文本End SubPrivate Sub Command6_Click(Index As Integer)s1 = Val(Text1.Text) '将s1隐藏起来ysf = Command6(Index).CaptionText1.Text = ""End SubPrivate Sub Command7_Click()If Left(Text1.Text, 1) <> "-" Then '判断作为负数Text1.Text = "-" & Text1.TextElseText1.Text = Right(Text1.Text, Len(Text1.Text) - 1)End IfEnd SubPrivate Sub Command8_Click()Text1.Text = Text1.Text * Text1.Text '平方End Sub各位朋友，可以将红色代码复制到相应位置，不清楚的可以全选复制，但是一定要按照我的步骤和给的名称来哦！还可以再添加按钮Private Sub Command9_Click() '这是退出代码EndEnd Sub三、测试，成功的话给个好评哦！谢谢各位下载与支持！这个可以编写作为作业哦！。

VB简易计算器代码

VB简易计算器代码

Public Class Form1Dim OperatorState As IntegerDim data1 As IntegerDim result As IntegerDim data2 As Integer’下面是0~9十个按钮的点击事件Private Sub Button1_Click(ByVal sender As , ByVal e As Handles = + "1"End SubPrivate Sub Button2_Click(ByVal sender As , ByVal e As Handles = + "2"End SubPrivate Sub Button3_Click(ByVal sender As , ByVal e As Handles = + "3"End SubPrivate Sub Button4_Click(ByVal sender As , ByVal e As Handles = + "4"End SubPrivate Sub Button5_Click(ByVal sender As , ByVal e As Handles = + "5"End SubPrivate Sub Button6_Click(ByVal sender As , ByVal e As Handles = + "6"End SubPrivate Sub Button7_Click(ByVal sender As , ByVal e As Handles = + "7"End SubPrivate Sub Button8_Click(ByVal sender As , ByVal e As Handles = + "8"End SubPrivate Sub Button9_Click(ByVal sender As , ByVal e As Handles = + "9"End SubPrivate Sub Button10_Click(ByVal sender As , ByVal e As Handles = + "0"End Sub’下面是清除键的代码Private Sub Button15_Click(ByVal sender As , ByVal e As Handles = ""End Sub’下面是加减乘除四个按钮的代码Private Sub Button11_Click(ByVal sender As , ByVal e As Handles data1 = ValOperatorState = 1= ""End SubPrivate Sub Button12_Click(ByVal sender As , ByVal e As Handlesdata1 = ValOperatorState = 2= ""End SubPrivate Sub Button13_Click(ByVal sender As , ByVal e As Handles data1 = ValOperatorState = 3= ""End SubPrivate Sub Button14_Click(ByVal sender As , ByVal e As Handles data1 = ValOperatorState = 4= ""End Sub’下面是等于号的的代码Private Sub Button16_Click(ByVal sender As , ByVal e As Handlesdata2 = ValIf (OperatorState = 1) Thenresult = data1 + data2End IfIf (OperatorState = 2) Thenresult = data1 - data2End IfIf (OperatorState = 3) Thenresult = data1 * data2End IfIf (OperatorState = 4) Then result = data1 / data2End If= Str(result)End SubEnd Class。

用VB编写一个简单计算器

用VB编写一个简单计算器

用VB编写一个简单计算器一、功能：实现简单的加减乘除功能，C归零，CE取消输入，%计算并显示第一个操作数的百分比。

二、控件：1个label，20个commandbutton。

三、计算器运行界面：四、详细代码：Option ExplicitDim 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 = 0Op2 = 0Form_LoadEnd Sub' CE (取消输入) 按钮的Click 事件过程Private Sub CancelEntry_Click()Readout = Format(0, "0.")DecimalFlag = FalseLastInput = "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" ThenReadout = Format(0, "-0.")ElseIf LastInput <> "NUMS" ThenReadout = Format(0, "0.")End IfDecimalFlag = TrueLastInput = "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 = FalseNumOps = 0LastInput = "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" ThenReadout = Format(0, ".")DecimalFlag = FalseEnd IfIf DecimalFlag ThenReadout = Readout + Number(Index).CaptionElseReadout = Left(Readout, InStr(Readout, Format(0, ".")) - 1) + Number(Index).Caption + Format(0, ".")End IfIf LastInput = "NEG" Then Readout = "-" & ReadoutLastInput = "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。

用VB制作计算器

用VB制作计算器

用VB制作计算器在VB编程语言中，可以使用Windows Forms应用程序来制作一个简单的计算器。

Windows Forms应用程序是VB的一种可视化编程工具，可以为用户提供一个图形用户界面。

首先，我们需要创建一个新的Windows Forms应用程序项目，并打开默认生成的Form1窗体。

接下来，我们可以使用Windows Forms控件来创建一个计算器的用户界面。

在Form1窗体上，我们可以添加一个TextBox控件用于显示计算结果，并设置其属性为只读。

```vbPrivate ReadOnly resultTextBox As TextBox = New TextBox```然后，我们可以添加一些Button控件来表示计算器的数字和操作符。

我们可以使用按钮的Click事件来处理用户的点击操作。

```vbPrivate ReadOnly buttons As List(Of Button) = New List(Of Button)```接下来，我们需要实现按钮的Click事件处理程序来执行相应的计算逻辑。

我们可以使用Eval函数来计算表达式的值，并将结果显示在TextBox中。

Private Sub Button_Click(sender As Object, e As EventArgs) Dim button As Button = TryCast(sender, Button)If button IsNot Nothing ThenDim buttonText As String = button.TextIf buttonText = "=" Then'计算表达式的值Dim expression As String = resultTextBox.TextDim value As Double = Eval(expression)resultTextBox.Text = value.ToStringElseIf buttonText = "C" Then'清空文本框resultTextBox.Text = ""Else'添加数字或操作符resultTextBox.Text += buttonTextEnd IfEnd IfEnd Sub最后，我们需要在窗体的构造函数或Load事件处理程序中将按钮和TextBox添加到窗体上。

VB计算器加减乘除代码

VB计算器加减乘除代码

VB计算器加减乘除代码以下是一个简单的VB计算器程序，可以进行加减乘除运算。

```vbPublic Class Form1Dim num1 As DoubleDim num2 As DoubleDim op As StringPrivate Sub btnNum_Click(sender As Object, e As EventArgs) Handles btn0.Click, btn1.Click, btn2.Click, btn3.Click,btn4.Click, btn5.Click, btn6.Click, btn7.Click, btn8.Click,btn9.ClickDim btn As Button = DirectCast(sender, Button)txtDisplay.Text += btn.TextEnd SubPrivate Sub btnClear_Click(sender As Object, e As EventArgs) Handles btnClear.ClicktxtDisplay.Text = ""End SubPrivate Sub btnOperator_Click(sender As Object, e As EventArgs) Handles btnPlus.Click, btnMinus.Click,btnMultiply.Click, btnDivide.ClickDim btn As Button = DirectCast(sender, Button)num1 = Double.Parse(txtDisplay.Text)op = btn.TexttxtDisplay.Text = ""End SubPrivate Sub btnEquals_Click(sender As Object, e As EventArgs) Handles btnEquals.Clicknum2 = Double.Parse(txtDisplay.Text)Dim result As DoubleSelect Case opCase "+"result = num1 + num2Case "-"result = num1 - num2Case "*"result = num1 * num2Case "/"If num2 <> 0 Thenresult = num1 / num2ElseMessageBox.Show("除数不能为0！", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error)txtDisplay.Text = ""ReturnEnd IfEnd SelecttxtDisplay.Text = result.ToStringEnd SubEnd Class```在这个计算器程序中，我使用了一个文本框(txtDisplay)来显示用户输入的数字和运算结果。

用VB编写计算器

用VB编写计算器

用VB编写计算器2007-01-09 10:36一．实验目的用vb语言编写一个简易计算器二．实验要求1．能够完成浮点数的加，减，乘，除；（平方等）2．能够实现退格和清除功能；3．初始值为0.0；4．小数点不能重复输入；5．高位数的0不出现；6．应用控件数组实现。

三．控件属性列表1、创建控件组的方法a、首先创建一个命令按钮，调整其大小—宽、高为 495，名称为Command1，aption 属性为数字 0 。

b、然后进行“复制”和“粘贴”，当选择“粘贴”时，出现对话框提示已有一个同名控件，询问是否创建控件组，选择“是”后，即创建了一个名为“Command”的控件组。

这时，第一个按钮的Index属性值默认为“0”，第二个的Index属性值自动设为“1”，并且大小与第一个按钮相同，只需修改其Caption 属性为数字“1”并将其拖至合适位置即可。

此后继续使用“粘贴”的方法建立其他控件组中其余按钮，共19个按钮，每建立一个，就将它拖到合适处，并修改相应的Caption属性值。

c、建立其他控件：如右图所示2、各控件属性设置如下：控件控件控件名称 Caption 控件名称 Caption窗体 Form 1 计算器按钮 Command 2（0） +按钮 Command 3 退格按钮 Command 2（1） -* 按钮 Command 4 . 按钮 Command 2（2）按钮 Command 5 = 按钮 Command 2（3） /按钮 command 6 + 按钮Command 7 ±按钮 Command 1（0）～Command1（9） Caption 0 ～ 9 各个属性修改后得到如图所示的界面四程序如下Dim shu1 As Single, shu2 As Single, suanfu As String'定义两个单精度数变量用与存放参与运算的数,一个字符型存放运算符Private Sub Command1_Click(Index As Integer)Text1.Text = Text1.Text & Command1(Index).Caption'将command1的单击事件与文本框显示的内容连接End SubPrivate Sub Command2_Click(Index As Integer)shu1 = Val(Text1.Text) '将shu1隐藏起来suanfu = Command2(Index).CaptionText1.Text = ""End SubPrivate Sub Command4_Click()Text1.Text = Text1.Text + "."If (InStr(Text1.Text, ".") = 1) Then '第一位不能为小数Text1.Text = ""End IfIf InStr(Text1.Text, ".") < Len(Text1.Text) Then'防止出现两个小数点Text1.Text = Left(Text1.Text, Len(Text1.Text) - 1)End IfEnd SubPrivate Sub Command5_Click() '开始加减乘除的运算shu2 = Val(Text1.Text)Select Case suanfuCase "+"Text1.Text = shu1 + shu2Case "-"Text1.Text = shu1 - shu2Case "*"Text1.Text = shu1 * shu2Case "/"If shu2 = 0 ThenMsgBox "分母不能为零!", 1 + 32 + 0,"错误" '错误提示框图下所示Text1.Text = ""ElseText1.Text = shu1 / shu2End IfEnd SelectEnd SubPrivate Sub Command3_Click() '假如输入错误,可每次退后一格If Text1.Text = "" ThenExit SubEnd IfText1.Text = Left(Text1.Text, Len(Text1.Text) - 1)End SubPrivate Sub Command6_Click()Text1.Text = "" '清除End SubPrivate Sub Command7_Click() '平方运算Text1.Text = Text1.Text * Text1.TextEnd SubPrivate Sub Command8_Click()If Left(Text1.Text, 1) <> "-" ThenText1.Text = "-" & Text1.TextElseText1.Text = Right(Text1.Text, Len(Text1.Text) - 1) End IfEnd SubPrivate Sub Form_Click()a = Int(Rnd() * 255)b = Int(Rnd() * 255)c = Int(Rnd() * 255)Form1.BackColor = RGB(a, b, c)End Sub。

简单计算器VB完美教程

简单计算器VB完美教程

简单计算器完美教程方法及步骤：第一步：在窗口中放置控件。

要点：十个数字按钮为按钮数组（画一个，其余几个拷贝出来），四个运算符为按钮数组，其它控件及按钮单独建立（一个一个的画出来）。

第二步：配置各个控件的属性，调整大小和位置第三步：编写代码备注：代码可以直接从本文中拷贝过去，但不是太建议这样子做，自己编写的时候可以学到更多的知识。

窗口属性代码Dim s1 As Single, s2 As Single, ysf As String, cfs As SinglePrivate Sub Command1_Click(Index As Integer)If cfs > 0 Then '输入数字之前判断是否为重复计算（cfs重复算）Text1.Text = "" '重复算就清零之前的显示cfs = 0 '重复算代码清零End IfText1.Text = Text1.Text & Command1(Index).Caption '数字框按钮与文本框关联If Len(Text1.Text) > 13 Then '限制录入13位数字MsgBox "数字不能大于13位"Text1.Text = Left(Text1.Text, Len(Text1.Text) - 1)End IfEnd SubPrivate Sub Command2_Click(Index As Integer)s1 = Text1.Text '按运算符时存数据1ysf = Command2(Index).Caption '提取运算符Text1.Text = "" '清除文本框里的数据1，等待录入数据2 End SubPrivate Sub Command3_Click()Text1.Text = Text1.Text + "."If InStr(Text1.Text, ".") = 1 Then '小数点录入的时候不能是第一位Text1.Text = ""End IfIf InStr(Text1.Text, ".") < Len(Text1.Text) Then '小数点出现的位置只有等于字长才让录入Text1.Text = Left(Text1.Text, Len(Text1.Text) - 1) '出现第二个小数点会删除End IfEnd SubPrivate Sub Command4_Click()If Text1.Text = "" ThenExit SubEnd IfText1.Text = Left(Text1.Text, Len(Text1.Text) - 1) '删除最后一位数End SubPrivate Sub Command5_Click()cfs = cfs + 1 '按“=”号后重复算代码加1s2 = Val(Text1.Text) '提取数据2Select Case ysf '根据运算符进行运算Case "+"Text1.Text = s1 + s2Case "-"Text1.Text = s1 - s2Case "*"Text1.Text = s1 * s2Case "/"If s2 = 0 Then '避免除以零MsgBox "分母不能为零"Text1.Text = ""ElseText1.Text = s1 / s2End IfEnd SelectIf Left(Text1.Text, 1) = "." ThenText1.Text = "o" & Text1.TextEnd IfEnd SubPrivate Sub Command6_Click()Text1.Text = ""End Sub全文完。

使用VB设计一个简易计算器

使用VB设计一个简易计算器

使用VB设计一个简易计算器下面是使用VB设计一个简易计算器的代码示例：```vbPublic Class FrmCalculatorDim operand1 As DoubleDim operand2 As DoubleDim operatorFlag As StringPrivate Sub BtnNumber_Click(sender As Object, e As EventArgs) Handles Btn0.Click, Btn1.Click, Btn2.Click, Btn3.Click, Btn4.Click, Btn5.Click, Btn6.Click, Btn7.Click, Btn8.Click, Btn9.ClickDim button As Button = CType(sender, Button)TxtResult.Text += button.TextEnd SubPrivate Sub BtnOperator_Click(sender As Object, e As EventArgs) Handles BtnPlus.Click, BtnMinus.Click,BtnMultiply.Click, BtnDivide.ClickDim button As Button = CType(sender, Button)operatorFlag = button.Textoperand1 = Val(TxtResult.Text)TxtResult.Text = ""End SubPrivate Sub BtnEquals_Click(sender As Object, e As EventArgs) Handles BtnEquals.Clickoperand2 = Val(TxtResult.Text)Select Case operatorFlagCase "+"TxtResult.Text = (operand1 + operand2).ToStringCase "-"TxtResult.Text = (operand1 - operand2).ToStringCase "*"TxtResult.Text = (operand1 * operand2).ToStringCase "/"If operand2 <> 0 ThenTxtResult.Text = (operand1 / operand2).ToStringElseTxtResult.Text = "Cannot divide by zero"End IfEnd SelectEnd SubPrivate Sub BtnClear_Click(sender As Object, e As EventArgs) Handles BtnClear.ClickTxtResult.Text = ""End SubEnd Class```在上述代码中，Form上放置了一些按钮和一个文本框用于显示计算结果。

使用VB制作计算器程序

使用VB制作计算器程序

使用VB制作计算器程序计算器程序是一种用于进行数学计算的工具。

最常见的计算器是电子计算器，它可以实现简单的加减乘除等基本计算。

而现在，我们可以使用VB（即Visual Basic）编程语言制作一个计算器程序，使其在计算能力上有所提升。

首先，我们需要创建一个VB Windows Forms应用程序。

在创建项目时，我们可以选择桌面应用程序（Windows Forms）模板。

接下来，我们需要设计计算器的用户界面。

可以使用按钮、文本框等控件来实现基本的数字输入和计算。

假设我们的计算器有一个文本框用于显示输入和结果，并且有数字按钮和运算符按钮来输入表达式，并且还有一个等号按钮用于计算结果。

我们可以使用VB代码来实现各种按钮的功能。

以下是一个简单的计算器程序示例：```vbPublic Class Form1Dim num1 As Double ' 第一个操作数Dim num2 As Double ' 第二个操作数Dim result As Double ' 结果Dim operator As String ' 运算符'数字按钮的点击事件处理函数Private Sub NumberButton_Click(sender As Object, e As EventArgs) Handles Button1.Click, Button2.Click, Button3.Click, Button4.Click, Button5.Click, Button6.Click, Button7.Click, Button8.Click, Button9.Click, Button0.ClickDim number As Button = CType(sender, Button)TextBox1.Text += number.TextEnd Sub'运算符按钮的点击事件处理函数Private Sub OperatorButton_Click(sender As Object, e As EventArgs) Handles PlusButton.Click, MinusButton.Click, MultiplyButton.Click, DivideButton.ClickDim op As Button = CType(sender, Button)num1 = CDbl(TextBox1.Text)TextBox1.Clear[operator] = op.TextEnd Sub'等号按钮的点击事件处理函数Private Sub EqualsButton_Click(sender As Object, e As EventArgs) Handles EqualsButton.Clicknum2 = CDbl(TextBox1.Text)Select Case [operator]Case "+"result = num1 + num2Case "-"result = num1 - num2Case "*"result = num1 * num2Case "/"result = num1 / num2End SelectTextBox1.Text = result.ToStringEnd Sub'清除按钮的点击事件处理函数Private Sub ClearButton_Click(sender As Object, e As EventArgs) Handles ClearButton.ClickTextBox1.ClearEnd SubEnd Class```以上代码实现了简单的加减乘除功能，并将结果显示在文本框中。

用VB制作计算器

用VB制作计算器

摘要这个程序是我用VB制作的简单计算器，它可以实现简单的四则运算，数字的平方，平方根，正弦，余弦，倒数，以及进制的相互转换。

而且它的功能还有退格，清除当前数据，清除所有数据，复制数据，粘贴数据，退出程序。

在这个计算器的程序中，我用到了单行选择语句If …Then …Else…,If语句的嵌套，多条件选择语句Select Case,而且还用到了组合框，框架，菜单的设计，以及键盘事件，可以通过键盘来用于计算。

在此报告中我重点叙述了计算机的各个功能及用法。

特别是进制间的转换和数字与运算符之间的联系。

还有说明了键盘怎样用于操作计算。

虽然表达能力不太行，但我会尽力使用系统结构图，程序流程图，划分多个模块，让大家明白我设计的运算器的功能的。

目录摘要 (1)目录 (2)第一章任务概述 (3)1.1、目标 (3)1.2、需求概述 (3)1.2.1、鼠标操作 (3)1.2.2、键盘操作 (3)第二章总体设计 (4)2.1、系统结构功能图 (4)第三章功能分配 (5)3.1、打开计算器界面 (5)3.2、平方根，平方，倒数，正弦，余弦的实现 (7)3.3、退格 (8)3.4、清除 (8)3.4.1、清除当前数据 (8)3.4.2清除所有数据 (8)3.5、鼠标的输入 (9)3.6、进制间的转换 (11)小结 (13)第一章任务概述1.1、目标本系统的目标是建立一套可以计算数的平方，平方根，倒数，正弦，余弦，数字的进制转换的计算器系统，系统可以帮助我们更好的学习，更好的节省时间。

还能避免出现一些不必要的计算错误。

1.2、需求概述根据本系统的需求分析，系统的需求可以分为以下的几个方面：1.2.1、鼠标操作你可以利用鼠标点击界面上的各个按钮来实现计算器的运算。

1.2.2、键盘操作当不方便使用鼠标时可以利用键盘来实现运算，数字的复制和粘贴。

第二章总体设计2.1、系统结构功能图图2-1系统结构功能图第三章功能分配3.1、打开计算器界面图3-1 计算器界面Dim dflag As Integer‘小数点仍然存在吗？Dim i As IntegerDim opnre As Integer ‘初始值Dim prev As Double‘前面输入的操作数Dim oflag As Integer ‘等号前后对数字的标记Dim ind As Integer ‘cmdoperator控件数组的数Dim x As DoubleDim y As Double' 运算符 (+, -, x, /, =) 的 Click 事件过程' 如果接下来的按键是数字键，增加 val(text1.Caption)。

VB实例代码-计算器

VB实例代码-计算器

VB实例代码-计算器首先，需建立如下控件:标签:Label1命令按钮:名称 Caption值Cback ?Cclear CECstart CCsin SinCcos CosCsqrt SqrtCsign +/-Cpoint CpointCequal =控件数组:(命令按钮)Calcu(1) +Calcu(2) -Calcu(3) *Calcu(4) /Cnum(0) 0Cnum(1) 1...Cnum(9) 9然后在代码窗口写源码:Option ExplicitDim Num1, Num2 As Double Dim PointIn As Boolean Dim Inputing As Boolean Dim Operation1 As IntegerPrivate Sub Calcu_Click(i As Integer)If Inputing = False Then '在前次运算提交之后尚未输入新的数据Operation1 = i '运算符重置Num1 = Label1 '将显示栏里的数据赋值给第一个操作数Exit SubEnd IfInputing = False '将当前状态置为非输入数据阶段If Num1 <> 0 Then '非首次计算Num2 = Label1 '将显示栏里的数据赋值给第二个操作数Calculate (Operation1) '计算前一次运算并显示结果Else '首次计算Num1 = Label1 '将显示栏里的数据赋值给第一个操作数End IfOperation1 = i '提交运算符End SubPrivate Sub Cback_Click()Dim TheLen As IntegerTheLen = Len(Label1)If TheLen > 2 ThenIf Right(Label1, 1) = "." ThenLabel1 = Left(Label1, TheLen - 2) & "."ElseLabel1 = Left(Label1, TheLen - 1)End IfElseCclear_ClickEnd IfEnd SubPrivate Sub Cclear_Click()Label1 = "0."Num2 = 0PointIn = FalseEnd SubPrivate Sub Ccos_Click()Calculate (6)Inputing = FalseEnd SubPrivate Sub Cequal_Click()If Inputing Then '如果刚输入过数据'Or Operation1 > 0 Then Num2 = Label1 '将显示栏里的数据赋值给第二个操作数End IfInputing = False '将当前状态置为非输入数据阶段Calculate (Operation1) '计算提交的运算并显示结果Num1 = 0Operation1 = 0End SubPrivate Sub Calculate(Oprt As Integer) Select Case OprtCase 1Num1 = Num1 + Num2ShowResult (Num1)Case 2Num1 = Num1 - Num2ShowResult (Num1)Case 3Num1 = Num1 * Num2ShowResult (Num1)Case 4Num1 = Num1 / Num2ShowResult (Num1)Case 5Num2 = Label1Num1 = Sin(Num2)ShowResult (Num1)Case 6Num2 = Label1Num1 = Cos(Num2)ShowResult (Num1)Case 7Num2 = Label1Num1 = Sqr(Num2)ShowResult (Num1)End SelectEnd SubPrivate Sub ShowResult(Num As Double)If Num = Fix(Num) Then '整数Label1 = Num & "."ElseIf Left(Num, 1) = "." Then '第一个字符为小数点Label1 = "0" & NumElseIf Left(Num, 2) = "-." Then '前两个字符为"-." Label1 = "-0." & Right(CStr(Num), Len(CStr(Num)) - 2) ElseLabel1 = NumEnd IfEnd SubPrivate Sub Cnum_Click(Index As Integer)NumInput (Index)End SubPrivate Sub Cpoint_Click()If Inputing = False ThenLabel1 = "0."Inputing = TrueEnd IfPointIn = TrueEnd SubPrivate Sub Csign_Click()If Label1 <> "0." ThenDim StrTemp As StringStrTemp = Label1If Left(StrTemp, 1) = "-" ThenLabel1 = Right(StrTemp, Len(StrTemp) - 1) ElseLabel1 = "-" & StrTempEnd IfEnd IfEnd SubPrivate Sub Csin_Click()Calculate (5)Inputing = FalseEnd SubPrivate Sub Csqrt_Click()Dim x As Longx = Label1If x >= 0 ThenCalculate (7)ElseLabel1 = "Error!"End IfInputing = FalseEnd SubPrivate Sub Cstart_Click()Label1 = "0."Num1 = 0Num2 = 0PointIn = FalseInputing = TrueOperation1 = 0End SubPrivate Sub Form_KeyDown(KeyCode As Integer, Shift As Integer) Cequal.SetFocusIf KeyCode = 46 Then '按Del键Cclear_ClickEnd IfEnd SubPrivate Sub Form_KeyPress(KeyAscii As Integer)Select Case KeyAscii'键入数字:Case 48 To 57NumInput (KeyAscii - 48)Case 46 '小数点Cpoint_Click'键入运算符:Case 43 '加号Calcu_Click (1)Case 45 '减号Calcu_Click (2)Case 42 '乘号Calcu_Click (3)Case 47 '除号Calcu_Click (4)Case 27 '重新开始(退出键)Cstart_ClickCase 8 '退格Cback_ClickCase 13 '等于(回车键)Cequal_ClickEnd SelectEnd SubPrivate Sub Form_Load()Me.Top = (Screen.Height - Me.Height) / 2 Me.Left = (Screen.Width - Me.Width) / 2 Me.KeyPreview = TrueCstart_ClickEnd SubPrivate Sub NumInput(n As Integer) If Len(Label1) > 15 ThenExit SubEnd IfIf Inputing = False ThenCclear_ClickLabel1 = n & "."Inputing = TrueElseIf Label1 <> "0." ThenIf Right(Label1, 1) = "." ThenIf PointIn = False ThenDim TheLen As IntegerTheLen = Len(Label1)Label1 = Left(Label1, TheLen - 1) Label1 = Label1 & n & "."ElseLabel1 = Label1 & nEnd IfElseLabel1 = Label1 & nEnd IfElseIf PointIn ThenLabel1 = Label1 & nElseLabel1 = n & "." End IfEnd IfEnd Sub。

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用VB编写一个简单计算器
一、功能：实现简单的加减乘除功能，C归零，CE取消输入，%计算并显示第一个操作数的百分比。

二、控件：1个label，20个commandbutton。

三、计算器运行界面：
四、详细代码：
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
Readout = Op1
NumOps = 1
End Select
If LastInput <> "NEG" Then
LastInput = "OPS"
OpFlag = Operator(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 Percent_Click()
Readout = Readout / 100
LastInput = "Ops"
OpFlag = "%"
NumOps = NumOps + 1
DecimalFlag = True
End Sub。

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