need help with pointers in C
hi all,
well this is my first time here, and i have a pretty simple question i think ..
i have this project to do, in which i have to implement a linked list using pointers. well i have a int*head pointing to the head of list and
int ** p;
p = &head;
while(**p!=NULL) // is this right for going thru the list or something wrong here??
thanks a lot.
i would really appreciate any kind of help from anyone.
fatima
Okay I would have to see just a little more code to know where your program is breaking. However, I can start off by explaining linked list.
Notice that the p member points to another struct LinkedList. You may want to do a search for a more thorough explanation of stacks, queues, and other memory organization techniques that a linked list can be used for creating.Code:struct LinkedList{ int vaule; struct LinkedList *p; };
>while(**p!=NULL) // is this right for going thru the list or something wrong here??
p is a pointer to a pointer, dereferencing it once will give you the pointer it points to and dereferencing it twice will return the contents of the memory. So if p is a pointer to a node the loop should be:
And if p is a pointer to a pointer to a node it should be:Code:p = head; while ( p != NULL ) p = p->next;
-PreludeCode:p = &head; while ( *p != NULL ) *p = (*p)->next;
My best code is written with the delete key.
