0x13. C More singly linked lists Task 13 - humtej1204/holbertonschool-low_level_programming GitHub Wiki

13. Free (safe version)

#advanced

Write a function that frees a listint_t list.

  • Prototype: size_t free_listint_safe(listint_t **h);
  • This function can free lists with a loop
  • You should go though the list only once
  • Returns: the size of the list that was free’d
  • The function sets the head to NULL 
julien@ubuntu:~/0x13. More singly linked lists$ cat 102-main.c 
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "lists.h"

/**
 * main - check the code
 *
 * Return: Always 0.
 */
int main(void)
{
    listint_t *head;
    listint_t *head2;
    listint_t *node;

    head2 = NULL;
    add_nodeint(&head2, 0);
    add_nodeint(&head2, 1);
    add_nodeint(&head2, 2);
    add_nodeint(&head2, 3);
    add_nodeint(&head2, 4);
    add_nodeint(&head2, 98);
    add_nodeint(&head2, 402);
    add_nodeint(&head2, 1024);
    print_listint_safe(head2);
    head = NULL;
    node = add_nodeint(&head, 0);
    add_nodeint(&head, 1);
    add_nodeint(&head, 2);
    add_nodeint(&head, 3);
    add_nodeint(&head, 4);
    node->next = add_nodeint(&head, 98);
    add_nodeint(&head, 402);
    add_nodeint(&head, 1024);
    print_listint_safe(head);
    free_listint_safe(&head2);
    free_listint_safe(&head);
    printf("%p, %p\n", (void *)head2, (void *)head);
    return (0);
}
julien@ubuntu:~/0x13. More singly linked lists$ gcc -Wall -pedantic -Werror -Wextra -std=gnu89 102-main.c 2-add_nodeint.c 101-print_listint_safe.c 102-free_listint_safe.c -o n
julien@ubuntu:~/0x13. More singly linked lists$ ./n 
[0x11260f0] 1024
[0x11260d0] 402
[0x11260b0] 98
[0x1126090] 4
[0x1126070] 3
[0x1126050] 2
[0x1126030] 1
[0x1126010] 0
[0x1126600] 1024
[0x11265e0] 402
[0x11265c0] 98
[0x11265a0] 4
[0x1126580] 3
[0x1126560] 2
[0x1126540] 1
[0x1126110] 0
-> [0x11265c0] 98
(nil), (nil)
julien@ubuntu:~/0x13. More singly linked lists$

Repo:

  • GitHub repository: holbertonschool-low_level_programming
  • Directory: 0x13-more_singly_linked_lists
  • File: 102-free_listint_safe.c
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