my adding code does not work in calculator

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my code is

VB

 Num1 = Val(TextBox1.Text)
        TextBox1.Clear()
        Arithmetic = "+"
'btnEqual click is
 Num2 = Val(TextBox1.Text)
        If Arithmetic = "+" Then
            Answer = Num1 + Num2
textbox1.text=Answer

Posted 15-Dec-13 23:41pm

CHM021

Updated 16-Dec-13 20:21pm

DaveAuld

v3

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3 solutions

Solution 1

Since you are tagging this as ASP.NET, I will assume this is website code.
In which case, no it won't work like that. Variable values are not preserved between runs, they are destroyed when the page load (or postback processing) is completed.

If you want to preserve a value, you need to look at either storing the total in a Cookie (on the client) or the Session (on the server) and retrieving it before you start working.
Cookies[^]

Save in Session[^]
Read from Session[^]

BTW: You do realise that doing all your math operations in the codebehind will create a rather slow calculator, don't you?

Posted 15-Dec-13 23:52pm

OriginalGriff

Comments

CHM021 16-Dec-13 5:59am

I don't understand it clearly.When I run the program all operations work properly except + operation. It gives wrong answer ,for instance 7+7=77.

♥…ЯҠ…♥ 16-Dec-13 6:07am

you should have mention this in your question itself, you should not say code is not working.Every Code will work perfectly if and only if code logic is correct.
Every code is perfect until it satisfies requirement.

OriginalGriff 16-Dec-13 6:09am

Ah!
So, you need to look at your definition of Num1 and Num2...
I'm guessing, but did you declare them as strings?
Dim Num1 As String
Dim Num2 As String
If so, then that is exactly what I would expect to happen...
Declare them as integers and it should work fine:
Dim Num1 As Integer
Dim Num2 As Integer

Solution 3

just
Get a two variable or text box
For eg:-
initialize values
Z=x+y
or

Res=Val(txt1.text)+Val(txt2.text)

Posted 16-Dec-13 20:17pm

Member 10469675

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♥…ЯҠ…♥ · Accepted Answer · 2013-12-15T23:59:00

Solution 2

Hi,

Try this

Answer = val(Num1 + Num2);

By default string concatenation is happening in your case.So the above code might work for you.
Hope this helps you a bit.

Regards,
RK

Posted 15-Dec-13 23:59pm

♥…ЯҠ…♥

Updated 16-Dec-13 0:03am

v2

Comments

CHM021 16-Dec-13 6:06am

Thanks! It works for me.

♥…ЯҠ…♥ 16-Dec-13 6:09am

Cheers... Next time try to give more input about your question otherwise you may get delay to solve your issue. Upvote if it deserves.

OriginalGriff 16-Dec-13 6:10am

*Cough* VB *Cough*