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vb點(diǎn)虐 實(shí)現(xiàn)計(jì)算器的簡(jiǎn)單介紹

怎樣在VB .NET中調(diào)用記事本和計(jì)算器

這個(gè)啊,呵呵,應(yīng)該不難吧

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先找到你要打開的應(yīng)用程序的文件

然后用一個(gè)調(diào)用代碼:

System.Diagnostics.Process.Start("C:\WINDOWS\system32\notepad.exe")

這是要枯高前開記事本的

System.Diagnostics.Process.Start("C:\WINDOWS\system32\calc.exe")

這是打開計(jì)算器的

應(yīng)念塌該也可以把這兩個(gè)應(yīng)用程序復(fù)制到你的程序的默認(rèn)目錄下,就是BIN下吧!

呵呵,試沒清試?。∫o我加分哦?。?!

VB.NET怎么編模擬袖珍計(jì)算器的完整程序?

Public C護(hù)激篙刻蕻灸戈熏讓賀恭抹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 "察滑桐敗坦+"

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

vb:簡(jiǎn)易計(jì)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 + "."弊含

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 + "租賣笑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 = "配塵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

如何用vb點(diǎn)虐 編寫一個(gè)簡(jiǎn)單的計(jì)算器程序?。慷嘀x啊

你自己顫灶加窗體和空茄乎扮頃信件吧

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(huì)的叫我 在線談

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