C/C++ :: Pointer To Last Node Of A Circular Linked List
Nov 30, 2014Why is it sufficient to only have a pointer to the last node of the list?
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C++ :: Linked List Node Passed As Parameter / Argument Pointer To Pointer Notation
Jan 17, 2014I was having problems changing the value of my head node I passed it as an argument as head which would be the address. The parameter was defined as struct node *head. like this
bool deleteNode(struct node *head, struct node *delptr)
I tried manipultaing pointer values to change head node value but it did not work. I saw some code online which used pointer to pointers(in code below) to change head node value it worked I dont fully understand why. Would like better understanding of why.
Would also like to know why the argument call needed &head instead of just head.
remove = deleteNode(&head,found); opposed to remove = deleteNode(head,found);
#include "stdafx.h"
#include<iostream>
struct node{
[Code].....
C++ :: Pointer To Last Node Of A Doubly Linked List
Nov 30, 2014Why is it sufficient to only have a pointer to the last node of a doubly linked list?
View 1 Replies View RelatedC/C++ :: Freeing Linked List Node With Pointer?
Mar 30, 2015I'm having a bit of an issue here. I have a linked list where each node contains a pointer to a string (which has been malloc'd when the node was created and inserted) and a pointer to the next node in the linked list.
I'm creating a function which will free the node (or effectively delete it). However, I'm receiving a free(): invalid pointer error.
My function:
void removeNode(node *(*nodeToRemove))
{
free((*nodeToRemove)->data);
(*nodeToRemove)->next = NULL;
free(*nodeToRemove);
}
Is this how I should go about freeing this node?
C++ :: Maintaining Additional Pointer To First Node In Doubly Linked List
Nov 30, 2014Why would it be cumbersome to maintain an additional pointer to the first node in a doubly linked list?
View 1 Replies View RelatedC++ :: Creating Circular Linked List
Jan 30, 2015I've been making a circular linked list and I'm trying to assign each list a "name" and its next "link" but when I run my code it crashes.
Soldier *Head;
Head = NULL;
string names[] = {"Arman","Bogut","Castro","Damascus","Elene"};
for (int i = 0; i < 5; ++i) {
[Code] .....
C++ :: Circular Doubly Linked List Code
Feb 27, 2014When I run this in main it gives me a windows error message. I believe it has something to do with my insertAtEnd function but I've gone over it a million times....
#include<iostream>
#include<string>
#include<vector>
#include"RhymeGame.h"
using namespace std;
Game::Game() {
head = NULL;
[Code] ....
C++ :: Adding To The End Of A Doubly Linked Circular List?
Dec 2, 2014Should my if statement be
if (tail== NULL) or if(tail->next == tail) ?
C/C++ :: Reversing A Circular Doubly Linked List
Apr 25, 2015I print the original list, then reverse it, then try to print it again. Here is what I get when I do that:
So that second line should print 2 1 4 5
Here is the reverse function:
void reverseCirListDeque(struct cirListDeque *q)
{
struct DLink *curr = q->Sentinel;
do{
[Code].....
C/C++ :: Add Function To Tail Of A Doubly Linked Circular List
Nov 30, 2014I have a function that I would like to add to tail. It is not correct.
template<class T>
void DoublyLinkedCircularList<T> :: addToTail(T element) {
DoublyLinkedNode<T>* head;
DoublyLinkedNode<T>* temp;
temp->element = element;
[Code] .....
How do I fix it?
C++ :: Doubly Linked List - Circular Dependency Error
May 15, 2013When compiling the source I get the following error
"pms_program.h:54:56: error: expected declaration specifiers or ‘...’ before ‘CourseType’"
the code you are looking for in pms_course.h ( there is a circular dependency between pms.h , pms_course.h and pms_program.h)
function prototype AppendProgram ( part of doubly linked list )
I have attached the full course code.
As much as I like I cannot change the structure of the startup code ...
please see attached zip file for the entire source code.
C++ :: Use Circular Linked List And Data Structures To Store Tasks
Mar 30, 2014The program use a circular linked list and data structures to store the tasks.
- Every task should include a task name, a name for the person assigned to it, and the deadline for the task.
- Variables should be dynamic and their sizes should be determined at runtime based on the length of user input.
- You should implement the following functions (with appropriate arguments and return types) for your structure: add(), remove(), search(), and list().
- The add()function should add tasks alphabetically by task name. You do not need to implement any file operations.
- The search() function should be able search for a task by the task assignee name or the task name.
- The list() function should print records to the screen in the order they appear in the circular linked list.
- You should successfully deallocate all of the allocated memory before termination of your program.
C/C++ :: Add Node In Linked List?
Dec 5, 2014I create A program that will Add and Display the Link List but I have problem on it. If I add it will inserted in the prev node not in the next node. Here's my source code.
#include <stdio.h>
typedef struct Member {
int id;
char name[256];
struct Member *next;
[Code] ....
C :: Deleting A Node From Linked List
Apr 19, 2013I have a struct with some select student information. My wish is to be able to have the user type in a surname from the list, and for that entry to be deleted. However I am slipping up for some reason.
Here is the start of my program showing my struct:
Code:
#include <stdio.h>
#include <string.h>
#define NAME_LEN 30
#define LINE_LEN 80
struct record {
[Code] ....
I get the following errors in my while loop as well as the if statement below that loop:
-invalid operands to binary !=
-invalid type of argument '->'
C :: Handling Linked List Node Add At End?
May 17, 2014This is what I have at the moment which works as I would like but wondering if there is a better way of handling? Currently just making sure I know linked-lists well enough.
Code:
void push_to_end( node_t * headRef, int val ) {
node_t * tail = headRef;
node_t * new_node = malloc( sizeof ( node_t ));
while( headRef != NULL ) {
[Code].....
C :: Linked List - Allow User To Add A New Node
Aug 12, 2013I'm trying to impliment a simple singly linked list, then allow a user to add a new node. I have mocked up a siimple example to illustrate my point using Linked Lists...
Code:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
struct node {
int x;
struct node *next;
[Code] ....
So I have done things similatr to this in C# and Java but not in C. There maybe some parts of this I'm sure some will disagree with in terms of buffers,overflow etc. but it's just the linked list part that I am interested in at the moment, I am only doing it like this because when it works, I will be extracting the working linked list stuff into another program that can deal with its I/O etc.
I have tried to comment as best I can to demonstarte my intentions and understandings per line of code. The add function needs to add a node of value x that the user has input, and add that to the end of the list - I'm sure that the print function is not doing all its supposed to do...
C++ :: linked List - Deleting A Node
Mar 2, 2013If p is a pointer pointing a node to be deleted, then what's wrong in the following code:
cout << "Do you want to delete this record? (y/n) ";
if (getch() == 'y' || getch() == 'Y'){// Delete record.
if (p == *ph){//If first node is to be deleted.
*ph = (*ph)->next;
delete p;
[Code] .....
C++ :: Linked List - Implementation At Nth Node
Feb 27, 2015I have to write a program which has the user be able to enter a specific value at a specific position of the linkedlist, replacing that node with the user defined value
EX: Enter the value 5 at 2nd node, which will override the old value at the 2nd node with the new one
I am getting a compiler error which terminates my program right after the user presses the return key after he/she has given a position to change the value
Error: Unhandled exception at 0x013C50C1 in Linked(1).exe: 0xC0000005: Access violation reading location 0x0000812B.
I am not going to show the whole code as the problem resides solely on the insert function:
void TheNode::insert(double num, int choice) {
int post = 0;
MyNode *ptr = new MyNode;
(*ptr).value = num;
MyNode *previous = head;
MyNode *current = head->next;
[Code] .....
C++ :: Append Node To A Linked List
Jan 27, 2013I have a function that append node to a linked list like this:
struct ListNode{
int value;
struct ListNode* next;
};
void appendNode(struct ListNode* head, int num){
[code] ....
when I use it, the head in main() does not change its address and it's still pointing to NULL. Why??
C++ :: Should Delete Every Node In Linked List?
Jul 10, 2014Still toying with my self-coded linked list class and now another question: should I delete each node of my class with the delete in the class destructor or is it done automatically when the main() function ends?
View 4 Replies View RelatedC++ :: Linked List Remove Node
Oct 24, 2014How to remove node from linked list. I am trying to implement this in a file record to remove data from struct..I dont know how addressing in linked list work for structs;
#include <iostream>
#include<fstream>
#include<cstring>
#include<cstdlib>
using namespace std;
struct node{
int val;
[Code] ....
segmentation fault
C :: Linked List Insert Node Between Two Nodes
Oct 25, 2013I have a problem with inserting a node between two nodes.
Code:
#include <stdio.h>
#include <stdlib.h>
struct listelem {
int nbr;
struct listelem *next;
[Code] ....
C :: Adding A Second Node To A Doubly Linked List
Mar 6, 2015I am having trouble adding a second node to a doubly linked list. I define my list as follows:
Code:
typedef struct Node {
char command[256];
int length;
struct Node *prev;
struct Node *next;
} userInput;
}
[code]...
Now, when I iterate back through my list (I want to start at the tail and work my way towards the head), I can only ever get the 1st node to print, then the 2nd node is garbage, which means, to me, that I've linked something wrong.
C :: Sorting A Linked List Upon Node Insertion
Aug 30, 2013While I know that linked lists seem to be a fairly common problem area among beginner C programmers, most examples that I have come across abstract the sorting of a linked list to a separate function which is sadly not what I am trying to do.
The code below is my attempt to have the nodes inserted into their correct place so that once all nodes have been inserted they are already in a sorted order.
Code:
int main(int argc, char *argv[])
{
struct node_t* dict_head;
struct node_t* traversor;
struct node_t* newnode;
int list_size = 0, insert_key, search_key, delete_key, x;
char insert_word[WORDLEN];
/*Opening the dictionary file provided by the command line argument */
FILE *fp;
fp = fopen(argv[1], "r");
[Code]....
The problem is as follows. When you provide it with input in which the first word scanned is any other word than that which would be placed at the front of the list, it works as intended. For example.
7 world
0 ant
3 kodak
1 best
6 the
2 is
Produces ant -> best->is->kodak->best->world
However, swapping ant and world in the above input gives:
world->best->is->kodak->best->world
In regards to why I have my head node set as a node without a word or a key, it was suggested that I make it so that the first node inserted is set to be the head of the list and then changed as sorting required, yet this caused only additional problems.
C :: Delete A Node From Singly Linked List
Oct 18, 2014I was trying to write a function in C to delete a node(only from the middle) from a Singly Linked List. I wrote one but not sure if the code will work fine under all test conditions. I have tested it and shows no error so far.
Code:
void deleteAt(struct node *root, int number){
while(root->link != NULL) {
if(root->link->item == number) //checks if the next node is the element to be deleted {
root->link = root->link->link; //points the link of the element to be deleted to the element before the element to be deleted
}
else
root = root->link;
} }
Or is there a better way to do this?
C++ :: Deleting Nth Node From Doubly Linked List
Sep 19, 2013I need to delete the Nth node from a doubly linked list. I know I just cant delete it out right. I have all the goodies including a templetized node class. This is the code we're given:
template <typename T>
void doublyLinkedList<T>::deleteKthElement(const int item) {
}
It accepts an int, and should go to the Nth node and delete it.