4.VB计算器
Dim fh As String
Private Sub Command1_Click()
Dim a, b, s As Double
a = Text1.Text
b = Text2.Text
Select Case fh
Case "+"
s = Val(a) + Val(b)
Case "-"
s = Val(a) - Val(b)
Case "*"
s = Val(a) * Val(b)
Case "/"
s = Val(a) / Val(b)
End Select
Label3.Caption = s
Text3.Text = s
End Sub
Private Sub Command2_Click()
fh = "+"
End Sub
Private Sub Command3_Click()
Text1.Text = ""
Text2.Text = ""
Label3 = ""
End Sub
Private Sub Command4_Click()
fh = "-"
End Sub
Private Sub Command5_Click()
fh = "*"
End Sub
Private Sub Command6_Click()
End
End Sub
Private Sub Command7_Click()
fh = "/"
End Sub
Private Sub Form_Load()
End Sub
|