vb:簡(jiǎn)易計(jì)算器（加減乘除）代碼

代碼如下：

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Dim t, t1 As Integer

Dim x, y As Double

Public Sub com()

x = Val(l1.Caption)

Select Case t1

Case Is = 1: y = y + x

Case Is = 2: y = y - x

Case Is = 3: y = y * x

Case Is = 4: y = y / x

End Select

t1 = 0

t = 0

l1.Caption = "0"

End Sub

Private Sub Form_Load()

x = 0

y = 0

t = 0

t1 = 1

End Sub

Private Sub c0_Click(Index As Integer)

If l1.Caption = "0" Then

l1.Caption = "0"

Else

l1.Caption = l1.Caption + "0"

End If

End Sub

Private Sub C1_Click(Index As Integer)

If l1.Caption = "0" Then

l1.Caption = "1"

Else

l1.Caption = l1.Caption + "1"

End If

End Sub

Private Sub c10_Click(Index As Integer)

If t = 0 Then

l1.Caption = l1.Caption + "."

t = 1

End If

End Sub

Private Sub C2_Click(Index As Integer)

If l1.Caption = "0" Then

l1.Caption = "2"

Else

l1.Caption = l1.Caption + "2"

End If

End Sub

Private Sub C3_Click(Index As Integer)

If l1.Caption = "0" Then

l1.Caption = "3"

Else

l1.Caption = l1.Caption + "3"

End If

End Sub

Private Sub C4_Click(Index As Integer)

If l1.Caption = "0" Then

l1.Caption = "4"

Else

l1.Caption = l1.Caption + "4"

End If

End Sub

Private Sub C5_Click(Index As Integer)

If l1.Caption = "0" Then

l1.Caption = "5"

Else

l1.Caption = l1.Caption + "5"

End If

End Sub

Private Sub C6_Click(Index As Integer)

If l1.Caption = "0" Then

l1.Caption = "6"

Else

l1.Caption = l1.Caption + "6"

End If

End Sub

Private Sub C7_Click(Index As Integer)

If l1.Caption = "0" Then

l1.Caption = "7"

Else

l1.Caption = l1.Caption + "7"

End If

End Sub

Private Sub C8_Click(Index As Integer)

If l1.Caption = "0" Then

l1.Caption = "8"

Else

l1.Caption = l1.Caption + "8"

End If

End Sub

Private Sub C9_Click(Index As Integer)

If l1.Caption = "0" Then

l1.Caption = "9"

Else

l1.Caption = l1.Caption + "9"

End If

End Sub

Private Sub z1_Click(Index As Integer)

com

t1 = 1

End Sub

Private Sub z2_Click(Index As Integer)

com

t1 = 2

End Sub

Private Sub z3_Click(Index As Integer)

com

t1 = 3

End Sub

Private Sub z4_Click(Index As Integer)

com

t1 = 4

End Sub

Private Sub z5_Click(Index As Integer)

tmp = Mid(l1.Caption, Len(l1.Caption), 1)

If tmp = "." Then

t = 0

End If

If Len(l1.Caption) = 1 Then

l1.Caption = "0"

Else

l1.Caption = Left(l1.Caption, Len(l1.Caption) - 1)

End If

End Sub

Private Sub z6_Click(Index As Integer)

l1.Caption = "0"

Form_Load

End Sub

Private Sub z7_Click(Index As Integer)

If (l1.Caption "0") Then

l1.Caption = "-" + l1.Caption

End If

End Sub

Private Sub z8_Click(Index As Integer)

com

l1.Caption = Str(y)

End Sub

擴(kuò)展資料

語(yǔ)言缺點(diǎn)

Visual Basic 語(yǔ)言具有不支持繼承、無(wú)原生支持多線程、異常處理不完善等三項(xiàng)明顯缺點(diǎn)，使其有所局限性（此些缺點(diǎn)皆已在 vb 點(diǎn)虐 獲得改進(jìn)）。

不支持繼承

VB 5.0 和 VB 6.0 都是基于對(duì)象的編程語(yǔ)言，但是不包含繼承特性。VB 中提供了特殊的類的功能，但是還是不能滿足程序員的需求。

無(wú)原生支持多線程

Visual Basic 對(duì)于多線程無(wú)原生支持，只能通過(guò)Windows API的調(diào)用實(shí)現(xiàn)，且極其的不穩(wěn)定。因?yàn)樵贏PI創(chuàng)建的線程中，并沒(méi)有自動(dòng)初始化運(yùn)行時(shí)庫(kù)，導(dǎo)致部分的函數(shù)無(wú)法使用。一般的，在VB6等早期的VB開發(fā)環(huán)境下，使用API創(chuàng)建線程的目的是完成容易使程序假死的大量數(shù)據(jù)或者邏輯的計(jì)算。

異常處理不完善

Visual Basic 中內(nèi)置異常處理，即使未寫異常處理代碼，一旦用戶出錯(cuò)也會(huì)彈出一個(gè)明確寫出出錯(cuò)原因?qū)υ捒?，接著程序終止。

Visual Basic 中可以使用 Err.Raise拋出異常。對(duì)系統(tǒng)及用戶拋出的異常的處理常用兩種模式：一是使用 On Error Resume Next 處理錯(cuò)誤；另一種是使用 On Error Goto 將運(yùn)行引入錯(cuò)誤處理代碼。但相對(duì) C++ 等語(yǔ)言而言，這樣的異常處理破壞了代碼的結(jié)構(gòu)。

參考資料：百度百科-VB

VB.NET怎么編模擬袖珍計(jì)算器的完整程序？

Public C護(hù)激篙刻蕻灸戈熏恭抹lass Form1

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

Dim c As Char

c = Trim(TextBox3.Text)

Select Case c

Case "+"

TextBox4.Text = Val(TextBox1.Text) + Val(TextBox2.Text)

Case "-"

TextBox4.Text = Val(TextBox1.Text) - Val(TextBox2.Text)

Case "*"

TextBox4.Text = Val(TextBox1.Text) * Val(TextBox2.Text)

Case "\"

If Val(TextBox2.Text) = 0 Then

MsgBox("分母為0")

Else

TextBox4.Text = Val(TextBox1.Text) \ Val(TextBox2.Text)

End If

Case "/"

If Val(TextBox2.Text) = 0 Then

MsgBox("分母為0")

Else

TextBox4.Text = Val(TextBox1.Text) / Val(TextBox2.Text)

End If

End Select

End Sub

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click

End

End Sub

End Class

用vb點(diǎn)虐 做計(jì)算器的代碼怎么寫，其中的控件有radiobutton1234，分別代表+-*/，

界面代碼就不給你貼了，TextBox3顯示的是結(jié)果。

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

Dim num1 As Integer = 0

Dim num2 As Integer = 0

Dim result As Integer = 0

Try

num1 = Integer.Parse(TextBox1.Text)

Catch ex As Exception

num1 = 0

End Try

Try

num2 = Integer.Parse(TextBox2.Text)

Catch ex As Exception

num2 = 0

End Try

If RadioButton1.Checked Then

result = num1 + num2

ElseIf RadioButton2.Checked Then

result = num1 - num2

ElseIf RadioButton3.Checked Then

result = num1 * num2

Else

result = num1 / num2

End If

TextBox3.Text = result

End Sub

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click

Me.Close()

End Sub