Re: [linuxiran] [OT] C programming, variable size array

[Arash Bijanzadeh]

On Saturday 13 December 2003 00:15, Aryan Ameri wrote:
> On Friday 12 December 2003 22:05, Arash Partow wrote:
> > Hi Aryan,
> >
> > There are 2 important methods malloc and realloc
> > malloc allocated memory and realloc as its name
> > suggests allow you to re-allocate more memory from the OS.
> >
> >
> > ie:
> >
> >  /*
> >       create dynamic array,  guess an initial size in your case....
> >  */
> >
> >    int   myArraySize = 123;
> >    char* myArray     = (char*)malloc(sizeof(char)*myArray);
> >
> >    if(myArray == NULL)
> >    {
> >       printf("!-ERROR-!  System could not allocate memory...\n");
> >    }
> >     .
> >     .
> >     .
> >     now lets say you want to add more to the array but you've
> >     reached the limit of the array.
> >
> >    int additionalLength = 123;
> >    if ((myArray =
> > (char*)realloc(myArray,sizeof(char)*(myArraySize+additionalLength))
> > == NULL) {
> >       printf("!-ERROR-!  System could not re-allocate memory...\n");
> >    }
> >
> >     .
> >     .
> >     .
> >
> >
> >  If you have anymore questions feel free to ask.
>
> I just studied pointers, but I didn't yet know of the existence of
> malloc and realoc. Anyway, your code, as well as these functions man
> pages are now putting me in the right direction. Thanks for the help.
>
> And I want to be bold, and ask again, cause this is really important for
> me: Anyone know of any C mailing list? (pretty strange that I can't
> find one!!).
>
> Cheers

You can use gcc mailing lists. They are really helpful.
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Don't go around saying the world owes you a living.  The world owes you
nothing.  It was here first.
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