nested structures and pointers

[spongefreddie]

I have a conceptual question. If I have some structures declared thus:

struct film
{
   char title[TSIZE];
   int rating;
};

typedef struct film Item;

typedef struct node
{
   Item item;
   struct node * next;
}  Node;

typedef Node * List;

And I decide to re-define List as:

// typedef Node * List;

typedef struct list {
   Node * head;
   Node * end;
} List;

Would the references to the item member of Node then become:

List * plist;

plist->head->item;
// and/or
plist->end->item;

I ask because I had a structure assignment that used to work:

static void CopyToNode(Item item, Node * pnode)
{
   pnode->item = item;  // copying structure
}

After the 'List' definition change (mentioned above), I changed the CopyToNode() to:

static void CopyToNode(Item item, List * plist)
{
   plist->end->item = item;  // copying structure
}

The files compile with no errors, but the program crashes on the 'copying structure' line.

What am I forgetting?

[Bayint Naung]

Is plist pointing to valid memory location?
If so, how about plist->end?