Programming

#include <stdio.h>

main(int argc, char *argv[])
{
  char  **list = NULL;
  long  lcnt = 0;
  int   n;

        add_str2list(&list, "1.ABCDEF", &lcnt);
        add_str2list(&list, "2.123456", &lcnt);
        add_str2list(&list, "3.qwerty", &lcnt);
        add_str2list(&list, "4.654321", &lcnt);
        add_str2list(&list, "5.zxc", &lcnt);
        add_str2list(&list, "6.asd", &lcnt);

        printf("list is at %p\n", &list);
        for(n = 0; n < lcnt; n++)
        {
                printf("%i) %p <%s>\n", n, &list[n], list[n]);
        }
        return(0);
}

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

add_str2list(char ***arr, const char *str, long *cnt)
{
  const int     newsz   = sizeof(char *) * (*cnt + 1);
  const long    indx    = *cnt;

        if(*cnt == 0)
                *arr = malloc(newsz);
        else
                **arr = realloc(**arr, newsz);

        arr[0][indx] = strdup(str);
        *cnt = *cnt + 1;
        return(0);
}

list is at 0x7ffce9962180
0) 0x124c010 <1.ABCDEF>
1) 0x124c018 <2.123456>
2) 0x124c020 <3.qwerty>
3) 0x124c028 <��$
>
4) 0x124c030 <5.zxc>
5) 0x124c038 <6.asd>

       if(*cnt == 0)
                *arr = malloc(newsz);
        else
                **arr = realloc(**arr, newsz);