[ssug-malappuram] Re: [MES-FSUG] How do variables in different programming languages work?
- From: raghesh <raghesh.a@xxxxxxxxx>
- To: ssug-malappuram@xxxxxxxxxxxxx
- Date: Sat, 17 Sep 2011 23:20:12 +0530
On Thu, Sep 15, 2011 at 11:08 PM, Ershad K <ershad92@xxxxxxxxx> wrote:
> Hi,
>
> I've a small query, how do variables work? I mean, a variable stores
> reference of a memory location which varies whenever the program is
> executed. How's this linking between variable_name-and-reference done?
> Some kind of replace/macro? Will it take another memory space to store a
> information that links a variable name and the address it stores?
>
All memory accesses are done with a "base + index" calculation. There
is a data segment for each program to store the variables. The index
will be same for a variable for the lifetime, but the base is varied
at link time. I hope this answers your query. For more details refer
concepts like Segmentation, Paging, Virtual memory etc.
> The questions might be foolish,
How can this be a foolish question? We teachers need such questions
from our students.
but I would like to know this process is
> carried out by computers :)
> --
> Sincerely,
> Ershad K
> http://ershadk.wordpress.com
>
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--
Raghesh
Wiki: http://www.fosscommunity.in/wiki/Malappuram
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