lista c

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

struct struktura {
    int id;
    struct struktura *next;
};


void show( struct struktura *head ){
    struct struktura *p;
    p = head;

    while ( p != NULL ){
        printf("%d ", p->id);
        p = p->next;
    }
}
void add( struct struktura **head, int id ){
    struct struktura *p, *q;
    if ( *head == NULL ){
        p = (struct struktura*)malloc(sizeof( struct struktura ));
        *head = p;
        p->id = id;
        p->next = NULL;
    } else {
        p = *head;
        while ( p->next != NULL ){
            p = p->next;
        }
        q = (struct struktura*)malloc(sizeof( struct struktura ));
        p->next = q;
        q->next = NULL;
        q->id = id;

    }
}
void pushFront( struct struktura **head, int id ){
    struct struktura *nowy;
    nowy = (struct struktura*)malloc(sizeof( struct struktura ));
    nowy->id = id;
    nowy->next = *head;
    *head = nowy;
}
int main(){
    struct struktura *head;
    head = NULL;

    add(&head, 1);
    add(&head, 2);
    add(&head, 3);
    add(&head, 4);
    add(&head, 5);
    pushFront(&head, 6);
    show(head);

    return 0;
}