#include "header.h"

void linked_print(LinkedList *l)
{
    while (l != NULL)
    {
        printf("%lF\n", l->x);
        l = l->next;
    }
}

LinkedList *add_head(LinkedList *l, double x)
{
    if (l == NULL)
    {
        l = malloc(sizeof(LinkedList));
        if (l == NULL)
            exit(1);
        l->x = x;
        l->next = NULL;
    }

    if (l->x == 0.0)
    {
        l->x = x;
        l->next = NULL;
        return l;
    }

    LinkedList *tmp = malloc(sizeof(LinkedList));
    if (tmp == NULL)
        exit(1);

    tmp->next = l;
    tmp->x = x;
    return tmp;
}

LinkedList *del_head(LinkedList *l)
{
    if (l == NULL)
        return NULL;
    else if (l->next == NULL)
    {
        free(l);
        l = NULL;
        return NULL;
    }
    LinkedList *tmp = l->next;
    free(l);
    l = NULL;
    return tmp;
}

int len(LinkedList *l)
{
    int res = 0;
    while (l != NULL)
    {
        res++;
        l = l->next;
    }
    return res;
}

LinkedList get(LinkedList *l, int n)
{
    if (n > len(l))
        exit(3);
    int i;
    for (i = 0; i < n; i++)
    {
        l = l->next;
    }
    return *l;
}