doubly-linked-list

I don't understand difference between a double-ended and doubly-linked list. What is the major difference between the two? In a doubly linked list, each node has two pointers. One towards its next node and another one towards its previous node. In a double-ended linked list, each node has just one pointer which points to its next node. Its difference from the single-ended linked list is that instead of just one "head" node, it contains two pointers of this kind ("first" and "last"), so someone is able to insert elements to list from both ends of it. (Last picture isn't that clear, but it

All, in GNU c, I have a circular doubly linked-list I am trying to implement a delete_node function on. It works fine for all nodes except node 0. It does delete (free()) node 0, but the first time the list is traversed after deleting node 0, it is still present for the first pass causing the conditional to stopping the iteration to fail. The basics of the implementation are: struct record { char *line; int lineno; int linetype; struct record *prev; struct record *next; }; typedef struct record rec; void iterfwd (rec *list) { rec *iter = list; // second copy to iterate list if (iter == NULL) {

I am trying to swap two nodes in a doubly linked list. Below is the part of program having swap function. int swap (int x, int y) { struct node *temp = NULL ; struct node *ptr1, *ptr2; temp = (struct node *)malloc(sizeof(struct node)); if (head == NULL ) { printf("Null Nodes"); } else { ptr1 = ptr2 = head; int count = 1; while (count != x) { ptr1 = ptr1->next; count++; } int count2 = 1; while (count2 != y) { ptr2 = ptr2->next; count2++; } ptr1->next->prev = ptr2; ptr1->prev->next = ptr2; ptr2->next->prev = ptr1; ptr2->prev->next = ptr1; temp->prev = ptr1->prev; ptr1->prev = ptr2->prev; ptr2-

I want to implement the QuickSort Algorithm on a sync Doubly Linked List. I give the function "partition" the left and right border, then it starts to search lower values on the left side and put the greater ones on the right side. This works because my pivot Element is alway the most rightern one and after this steps it is in the middle. I always get an endless loop and I dont know why? Maybe wrong abort condition? Her my code: private void quickSortRec(DoublyLinkedList in, ListElement l, ListElement r) { ListElement pivot = partition(in, l, r); if(pivot!=null && l!=r){ quickSortRec(in, in

I have some degenerate tree (it looks like as array or doubly linked list). For example, it is this tree: Each edge has some weight. I want to find all equal paths, which starts in each vertex. In other words, I want to get all tuples (v1, v, v2) where v1 and v2 are an arbitrary ancestor and descendant such that c(v1, v) = c(v, v2) . Let edges have the following weights (it is just example): a-b = 3 b-c = 1 c-d = 1 d-e = 1 Then: The vertex A does not have any equal path (there is no vertex from left side). The vertex B has one equal pair. The path B-A equals to the path B-E (3 == 3) . The