From:	johne AT parallax DOT co DOT uk (John Eccleston)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Dynamic Arrays
Date:	Thu, 23 Jan 97 11:36:22 GMT
Organization:	Parallax Solutions Ltd
Lines:	69
Message-ID:	<854019318.453693@red.parallax.co.uk>
References:	<01bc072e$33eb9b20$ee038cd0 AT wahander>
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To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Josh Anderson asked:
>I know this is a stupid question, but how do you create a dynamic array of
>a bunch of structs? I only need to set the size of the array at init time.
>And then free the memory at exit. 
>
>Thanks in advance,
>Josh
>

Hi Josh,

You could try the following (example is in plain C):

----- CUT HERE -----
#include <stdlib.h>
#include <stdio.h>

#define MAX_ENTRIES 100

typedef struct MyStruct
{
   int  field1;
   char field2[100];
} MyStruct;

main()
{
   MyStruct
      *dynamic;

   int
      loop;

   /* Allocate the memory */
   dynamic = (MyStruct *) malloc(sizeof(MyStruct) * MAX_ENTRIES);

   if (dynamic != NULL)
   {
      /* Do whatever */
      for(loop = 0; loop < MAX_ENTRIES; loop++)
      {
         dynamic[loop].field1 = loop + 1;
         dynamic[loop].field2[0] = '\0';
      }

      /* Release the memory */
      free(dynamic);
   }
   else
   {
      printf("Could not allocate memory!\n");
   }
}
----- CUT HERE -----

Hope this helps

John

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