Ex.No:
Date:
CALCULATOR
USING CONTROL ARRAY
Aim:
To write a program to create calculator using control
array
Procedure:
1. Open new standard form in visual basic for
inserting controls.
2. Place textbox and command button
3. Write the code in button for
performs the operations.
4. Run the application.
Form Design Specification Table:
|
Object
|
Property
|
Settings
|
|
Form1
|
Name
|
Calculator
|
|
Command
|
Caption
|
^
|
|
Name
|
Cmdpower
|
|
|
Command
|
Caption
|
sqr
|
|
Name
|
Cmdsqr
|
|
|
Command
|
Caption
|
ac
|
|
Name
|
Cmdac
|
|
|
Command
|
Caption
|
off
|
|
Name
|
Cmdoff
|
|
|
Command
|
Caption
|
sin
|
|
Name
|
Cmdsin
|
|
|
Command
|
Caption
|
cos
|
|
Name
|
Cmdcos
|
|
|
Command
|
Caption
|
tan
|
|
Name
|
Cmdtan
|
|
|
Command
|
Caption
|
exp
|
|
Name
|
Cmdexp
|
|
|
Command1
|
Caption
|
0 to 9
|
|
Name
|
Command1
|
|
|
Command
|
Caption
|
+
|
|
Name
|
Cmdplus
|
|
|
Command
|
Caption
|
-
|
|
Name
|
Cmdminus
|
|
|
Command
|
Caption
|
*
|
|
Name
|
Cmdmul
|
|
|
Command
|
Caption
|
/
|
|
Name
|
Cmddiv
|
|
|
Command
|
Caption
|
.
|
|
Name
|
Cmddot
|
|
|
Command
|
Caption
|
=
|
|
Name
|
Cmd
|
Source Code:
Option Explicit
Dim cval, pval
As Double
Dim result As
Double
Dim choice As
String
Private Sub
cmdac_Click(Index As Integer)
Text1.Text = " "
End Sub
Private Sub
cmdequal_Click(Index As Integer)
Select Case
choice
Case
"+":
result = pval + cval
Text1.Text = result
Case
"-":
result = pval - cval
Text1.Text = result
Case
"*":
result = pval * cval
Text1.Text = result
Case
"/":
result = pval / cval
Text1.Text = result
Case
"^":
result = pval ^ cval
Text1.Text = result
End Select
End Sub
Private Sub
cmdoff_Click(Index As Integer)
End
End Sub
Private Sub
cmdpower_Click(Index As Integer)
Text1.Text = " "
pval = cval
choice = "^"
End Sub
Private Sub
cmdcos_click(Index As Integer)
Text1.Text = Cos(Val(Text1.Text))
End Sub
Private Sub
cmdsin_Click(Index As Integer)
Text1.Text = Sin(Val(Text1.Text))
End Sub
Private Sub
cmdsqr_Click(Index As Integer)
Text1.Text = Val(Text1.Text) * Val(Text1.Text)
End Sub
Private Sub
cmdexp_click(Index As Integer)
Text1.Text = Exp(Val(Text1.Text))
End Sub
Private Sub
cmdtan_Click(Index As Integer)
Text1.Text = Tan(Val(Text1.Text))
End Sub
Private Sub
command1_click(Index As Integer)
Text1.Text = Text1.Text &
command1(Index).Caption
cval = Text1.Text
End Sub
Private Sub
cmddot_click(Index As Integer)
Text1.Text =
Text1.Text & cmddot(Index).Caption
End Sub
Private Sub
cmdplus_click(Index As Integer)
Text1.Text = " "
pval = cval
choice = "+"
End Sub
Private Sub
cmdmins_click(Index As Integer)
Text1.Text = " "
pval = cval
choice = "-"
End Sub
Private Sub
cmdmul_click(Index As Integer)
Text1.Text = " "
pval = cval
choice = "*"
End Sub
Private Sub
cmddiv_click(Index As Integer)
Text1.Text = " "
pval = cval
choice = "/"
End Sub
Form Design:
Output:
