Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

Static variable inside procedure

Posted on 1998-12-25
10
179 Views
Last Modified: 2010-04-04
how to write a static variable inside the procedure? consider the following code, every time i call this procedure it will redeclare the variable x that's what i dont want to. i want the variable to be declare at the first call and keeping value after the rest of the calls.

procedure Test;
var
  x : integer;
Begin
  inc(x) //x will be the same value every time get call. i            want x to be increase every call.
End;
0
Comment
Question by:qwertyuiopasdfghjkl
  • 4
  • 2
  • 2
  • +2
10 Comments
 
LVL 10

Expert Comment

by:viktornet
ID: 1353051
Delphi(Pascal) is not C/C++ so you can't have a real static variable. The only way to at least try to imitate that is to use a global variable that will keep its value.

Merry Christmas!

-Viktor
--Ivanov
0
 
LVL 10

Expert Comment

by:viktornet
ID: 1353052
Well, I answered this question and it is still in the Unlocked section?!?!?! What's wrong??
0
 
LVL 1

Expert Comment

by:slautin
ID: 1353053
use global variable or define new class (Trigger for example)
and get your counter every time!
0
Networking for the Cloud Era

Join Microsoft and Riverbed for a discussion and demonstration of enhancements to SteelConnect:
-One-click orchestration and cloud connectivity in Azure environments
-Tight integration of SD-WAN and WAN optimization capabilities
-Scalability and resiliency equal to a data center

 
LVL 12

Expert Comment

by:rwilson032697
ID: 1353054
Sorry Viktor - you are wrong. (Although if it was for a static member in a CLASS or METHOD,. you would be right).

Do it like this:

procedure Test;
    const
      x : integer = 0;
    Begin
      inc(x) //x will be increased every call.
    End;

Cheers,

Raymond.
0
 
LVL 20

Expert Comment

by:Madshi
ID: 1353055
Yes, Raymond seems to be right.

I always wondered why Delphi likes something like this:
  procedure blaBla;
  const x : integer = 0;
  ...
and refuses to accept something like this:
  procedure blaBla;
  var x : integer = 0;
  ...
Now I know (thanx, Raymond) that the "const" declaration has a special meaning if used locally.

Regards... Madshi.
0
 
LVL 20

Expert Comment

by:Madshi
ID: 1353056
Yes, Viktor, that's really strange! Why is this question still in the unlocked area???
Perhaps the XX system is getting more and more intelligent so that it now is able to detect that your answer is wrong...   :-)))
0
 

Author Comment

by:qwertyuiopasdfghjkl
ID: 1353057

thank Raymond......now post it as answer...i will Accept it...
0
 
LVL 10

Expert Comment

by:viktornet
ID: 1353058
I forgot about the fucken typed constants in Delphi.... I really hate the way that they made it 'cuz you can never be sure it's a constant... I just hate that future of Delphi...

-Viktor
0
 
LVL 12

Accepted Solution

by:
rwilson032697 earned 30 total points
ID: 1353059
Cheers Madshi!

Do it like this:

       procedure Test;
           const
             x : integer = 0;
           Begin
             inc(x) //x will be increased every call.
           End;

       Cheers,

       Raymond.
0
 
LVL 10

Expert Comment

by:viktornet
ID: 1353060
i mean feature... ;-)
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

In this tutorial I will show you how to use the Windows Speech API in Delphi. I will only cover basic functions such as text to speech and controlling the speed of the speech. SAPI Installation First you need to install the SAPI type library, th…
Creating an auto free TStringList The TStringList is a basic and frequently used object in Delphi. On many occasions, you may want to create a temporary list, process some items in the list and be done with the list. In such cases, you have to…
Finds all prime numbers in a range requested and places them in a public primes() array. I've demostrated a template size of 30 (2 * 3 * 5) but larger templates can be built such 210  (2 * 3 * 5 * 7) or 2310  (2 * 3 * 5 * 7 * 11). The larger templa…

856 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question