VB.NET怎么編模擬袖珍計算器的完整程序？

Public C護激篙刻蕻灸戈熏恭抹lass Form1

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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

如何用VB.NET編寫計算器

簡單的說拖出一些控件，設(shè)置相應(yīng)的caption和屬性等等，雙擊每個button控件，進行相應(yīng)的處理，即可

vb:簡易計算器（加減乘除）代碼

代碼如下：

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

擴展資料

語言缺點

Visual Basic 語言具有不支持繼承、無原生支持多線程、異常處理不完善等三項明顯缺點，使其有所局限性（此些缺點皆已在 vb 點虐 獲得改進）。

不支持繼承

VB 5.0 和 VB 6.0 都是基于對象的編程語言，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。

無原生支持多線程

Visual Basic 對于多線程無原生支持，只能通過Windows API的調(diào)用實現(xiàn)，且極其的不穩(wěn)定。因為在API創(chuàng)建的線程中，并沒有自動初始化運行時庫，導(dǎo)致部分的函數(shù)無法使用。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，一旦用戶出錯也會彈出一個明確寫出出錯原因?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 處理錯誤；另一種是使用 On Error Goto 將運行引入錯誤處理代碼。但相對 C++ 等語言而言，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

如何用vb點虐 編寫一個簡單的計算器程序??？多謝啊

你自己加窗體和空件吧

Private Sub a1_Click()

X = Val(Text1.Text)

Y = Val(Text2.Text)

s = X + Y

Text3.Text = s

Text3.Locked = True

End Sub

Private Sub a2_Click()

X = Val(Text1.Text)

Y = Val(Text2.Text)

s = X - Y

Text3.Text = s

Text3.Locked = True

End Sub

Private Sub a3_Click()

X = Val(Text1.Text)

Y = Val(Text2.Text)

s = X * Y

Text3.Text = s

Text3.Locked = True

End Sub

Private Sub a4_Click()

X = Val(Text1.Text)

Y = Val(Text2.Text)

s = X / Y

Text3.Text = s

Text3.Locked = True

End Sub

不會的叫我 在線談