dev-cpp-users

[Dev-C++] Global to local variables

[David M. <ci...@ya...>]

I have global varibles in my program that are used by one function
to keep track of it's state. Is there a way to have a local varible 
to keep it's value between calls?

__________________________________________________
Do You Yahoo!?
Yahoo! Games - play chess, backgammon, pool and more
http://games.yahoo.com/

[Dev-C++] Global to local variables

[Graeme F. <gr...@dr...>]

Make your local variable static, then it will retain its value from one call
to the next

-----Original Message-----
I have global varibles in my program that are used by one function
to keep track of it's state. Is there a way to have a local varible
to keep it's value between calls?

Re: [Dev-C++] enum

[Graeme F. <gr...@dr...>]

Assigning values to an enum has (under certain circumstances) great value.
If you have set up an enum in a binary escalating scale (1,2,4,8,16 etc) and
you also wish to use it in a loop then use the bitwise shift operator as
follows:

#include <conio>
#include <iostream>

enum state {none = 1, open =2, modified = 4, deleted = 8};

int main(int argc, char* argv[])
{
   for (int i=1; i<=deleted; i<<=1)
   {
      std::cout << "did something\n";
   }
   getch();
   return 0;
}

Now it is possible to loop through each state and do something as well as
use logical operators to combine the different states using the bitwise or
operator, e.g..

fileState |= modified;

Graeme.

RE: [Dev-C++] Global to local variables

[Ioannis V. <no...@ho...>]

Yes using the keyword static. E.g.

void something(void)
{
 static int x;
 /* ... */
}


x keeps its value between function calls and is created only once. This
type of coding is not suitable for concurrent applications
(multithreading).


Ioannis

* Ioannis Vranos
* Programming pages: http://www.noicys.cjb.net
* Alternative URL: http://run.to/noicys


> -----Original Message-----
> From: dev...@li... 
> [mailto:dev...@li...] On Behalf 
> Of David McKen
> Sent: Saturday, April 20, 2002 11:41 PM
> To: Dev-C Mailing List
> Subject: [Dev-C++] Global to local variables
> 
> 
> I have global varibles in my program that are used by one function
> to keep track of it's state. Is there a way to have a local varible
> to keep it's value between calls?
> 
> __________________________________________________
> Do You Yahoo!?
> Yahoo! Games - play chess, backgammon, pool and more
> http://games.yahoo.com/
> 
> _______________________________________________
> Dev-cpp-users mailing list
> Dev...@li...
> https://lists.sourceforge.net/lists/listinfo/dev-cpp-users
> 

RE: [Dev-C++] Global to local variables

[David M. <ci...@ya...>]

static???

I was told that it will make sure the varible is initalized to 0
if it is uninitalized. As you can guess I ignored it because I called
it a waste of time

Anyway thanks

--- Ioannis Vranos <no...@ho...> wrote:
> Yes using the keyword static. E.g.
> 
> void something(void)
> {
>  static int x;
>  /* ... */
> }
> 
> 
> x keeps its value between function calls and is created only once.
> This
> type of coding is not suitable for concurrent applications
> (multithreading).
> 
> 
> Ioannis
> 
> * Ioannis Vranos
> * Programming pages: http://www.noicys.cjb.net
> * Alternative URL: http://run.to/noicys
> 
> 
> > -----Original Message-----
> > From: dev...@li... 
> > [mailto:dev...@li...] On Behalf 
> > Of David McKen
> > Sent: Saturday, April 20, 2002 11:41 PM
> > To: Dev-C Mailing List
> > Subject: [Dev-C++] Global to local variables
> > 
> > 
> > I have global varibles in my program that are used by one
> function
> > to keep track of it's state. Is there a way to have a local
> varible
> > to keep it's value between calls?
> > 
> > __________________________________________________
> > Do You Yahoo!?
> > Yahoo! Games - play chess, backgammon, pool and more
> > http://games.yahoo.com/
> > 
> > _______________________________________________
> > Dev-cpp-users mailing list
> > Dev...@li...
> > https://lists.sourceforge.net/lists/listinfo/dev-cpp-users
> > 
> 
> _______________________________________________
> Dev-cpp-users mailing list
> Dev...@li...
> https://lists.sourceforge.net/lists/listinfo/dev-cpp-users


__________________________________________________
Do You Yahoo!?
Yahoo! Games - play chess, backgammon, pool and more
http://games.yahoo.com/

Re: [Dev-C++] Global to local variables

[Abhijit S. <mu...@gm...>]

Use the 'static' keyword. For example

MyFunction()
{
    static int    TimesCalled =3D 0;    // Default value, assigned on =
the first call
    TimesCalled ++;
    printf("TimesCalled is %d\n", TimesCalled);
}
mdeth O
m.o.t.o[P.S.Y.C.H.O]=20

http://mudeth.tripod.com | ibr...@bi... | mu...@gm...
----- Original Message -----=20
  From: David McKen=20
  To: Dev-C Mailing List=20
  Sent: Sunday, April 21, 2002 2:11 AM
  Subject: [Dev-C++] Global to local variables


  I have global varibles in my program that are used by one function
  to keep track of it's state. Is there a way to have a local varible=20
  to keep it's value between calls?

  __________________________________________________
  Do You Yahoo!?
  Yahoo! Games - play chess, backgammon, pool and more
  http://games.yahoo.com/

  _______________________________________________
  Dev-cpp-users mailing list
  Dev...@li...
  https://lists.sourceforge.net/lists/listinfo/dev-cpp-users