Inserting an item into a linked list

/* Write a function for inserting an item into a linked list  */

node *insert(node *head)
{
node *find(node *p, int a);
node *new;   /* pointer to new node */
node *n1; /* pointer to node preceding key node */
int key;
int x; /* new item (number) to be inserted */

printf("Value of new item?");
scanf("%d", &x);
printf("Value of key item ? (type -999 if last) ");
scanf("%d", &key);

if(head->number == key) /* new node is first */
{
   new = (node *)malloc(size of(node));
   new->number = x;
   new->next = head;
   head = new;
}
else /* find key node and insert new node */
{ /* before the key node */
n1 = find(head, key);    /* find key node */

if(n1 == NULL)
  printf("\n key is not found \n");
else /* insert new node */
{
     new = (node *)malloc(sizeof(node));
     new->number = x;
     new->next = n1->next;
     n1->next = new;
}
   }
return(head);
}
node *find(node *lists, int key)
{
if(list->next->number == key)   /* key found */
return(list);
else

if(list->next->next == NULL) /* end */
return(NULL);
else
find(list->next, key);
}

If you like this please Link Back to this article...

<a href="http://learning-tutorial.blogspot.com/2010/01/inserting-item-into-linked-list.html">Inserting an item into a linked list</a>