Re: the word 'static'

[Jim Langston <jimlangston@xxxxxxxxxxxxxxxx>]

Static Variable: A variable that retains it's value.
Constant Variable: A variable that's value can not be changed.

The word Static comes from the original core memory that computers had.
It used a static charge, and would keep this charge when power was removed.

On some of the original computers there was a game that was installed and
ran before the machine was disassembled and shipped to it's new location.
Once everything was put back together the game would resume where it left
off, ensuring that everything was working. (Read in the book "Hackers")

So, what how does that apply to a Static variable?  Once the "power" is shut
off from your subroutine (it returns) the variable keeps it's value.  When
the subroutine is returned to the variable will have the same value.

If you do not declare your variables as static, then the next time the 
subroutine is called the variables will be re-initialized.

Regards,

Jim Langston

Me transmitte sursum, Caledoni!

Patrick Conner wrote:
> 
> Why are they called static varibles when the value can
> change? :)
> 
> In a subprocedure I have to reset file variables that I want
> reset upon reentry even when I am controlling the opening
> and closing of the file. Right?
> 
> The variable values are in memory and have nothing to do
> with or not the file is open. Correct?
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