vb袖珍计算机模拟程序,vb编程，用selectcase编一模拟袖珍计算器(四则运算即、 爱问知识人...

vb袖珍计算机模拟程序,vb编程，用selectcase编一模拟袖珍计算器(四则运算即、 爱问知识人...

Dim a As Double, b As Double, c As String

Private Sub Command1_Click()

Text1。Text = Text1。Text & "1"

End Sub

Private Sub Command10_Click()

Text1。

Text = Text1。Text & "9"

End Sub

Private Sub Command11_Click()

Text1。Text = Text1。Text & "8"

End Sub

Private Sub Command12_Click()

Text1。

Text = Text1。Text & "7"

End Sub

Private Sub Command13_Click()

Text1。Text = Text1。Text & "6"

End Sub

Private Sub Command14_Click()

Text1。

Text = Text1。Text & "5"

End Sub

Private Sub Command15_Click()

Text1。Text = Text1。Text & "4"

End Sub

Private Sub Command16_Click()

Text1。

Text = Text1。Text & "3"

End Sub

Private Sub Command17_Click()

Text1。Text = Text1。Text & "2"

End Sub

Private Sub Command2_Click()’清空

Text1。

Text = ""

Text1。SetFocus

End Sub

Dim i As Variant

If Text1。Text = "" Then Exit Sub

aa = Len(Text1。

Text)

If Text1。Text 57 Or Asc(Mid(Text1。Text, i, 1)) = 47 Then

MsgBox "非法数据，请重新输入!", 64, "提示!"

Text1。

Text = ""

Text1。SetFocus

Exit For

End If

Next i

End If

b = Val(Text1。

Text)

Select Case c

Case " "

Text1。Text = Val(a) Val(b)

Case "-"

Text1。

Text = Val(a) - Val(b)

Case "*"

If b = "0" Or a = "0" Then

MsgBox "0不可以其它数相乘，请输入正确的数据!", 16, "提示!"

Text1。

Text = ""

Text1。SetFocus

Exit Sub

End If

Text1。

Text = Val(a) * Val(b)

Case "/"

If Val(b) = 0 Then Exit Sub

If a = 0 Or b = 0 Then

MsgBox "0不可以作除数，请输入正确的数据!", 16, "提示!"

Text1。

Text = ""

Text1。SetFocus

Exit Sub

End If

Text1。Text = Val(a) / Val(b)

End Select

If IsNumeric(Text1。

Text) Then

Text1。Text = Text1。Text

End If

End Sub

Private Sub Command4_Click()

If Text1。

Text = "" Then Exit Sub

a = Text1。Text

Text1。Text = ""

c = "/"

End Sub

Private Sub Command5_Click()

If Text1。

Text = "" Then Exit Sub

a = Text1。Text

Text1。Text = ""

c = "-"

End Sub

Private Sub Command6_Click()

If Text1。

Text = "" Then Exit Sub

a = Text1。Text

Text1。Text = ""

c = "*"

End Sub

Private Sub Command7_Click()

If Text1。

Text = "" Then Exit Sub

a = Text1。Text

Text1。Text = ""

c = " "

End Sub

Private Sub Command8_Click()

If InStr(1, Text1。

Text, "。") > 0 Then Exit Sub

If Len(Text1。Text) = 0 Then Text1。Text = "0"

Text1。Text = Text1。Text & "。

"

End Sub

Private Sub Command9_Click()

Text1。Text = Text1。Text & "0"

End Sub

Private Sub Form_Load()

Text1。

fontsize = 40

End Sub

Private Sub Text1_Change()

If KeyAscii = 46 Then

If InStr(1, Text1。

Text, "。

") > 0 Then

KeyAscii = 0: Exit Sub

Else

Exit Sub

End If

End If

If KeyAscii >= 48 And KeyAscii <= 57 Then Exit Sub

If KeyAscii = 8 Or KeyAscii = 13 Then Exit Sub

If KeyAscii = 45 Then Exit Sub

KeyAscii = 0

End Sub。

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