C :: Sorted Linked List - Crashes On Malloc

Sep 29, 2013

So I've been working on a sorted linked list homework assessment and I've been stuck on a problem for a while now. Below is my code for inserting a new object into the linked list, for some reason it keeps crashing whenever I try to malloc temp. (between the "checkpoint" and "after malloc" printf statements) .

Code:

int SLInsert(SortedListPtr list, void *newObj){
SortedListPtr curr = list;
SortedListPtr temp = NULL;
if(list->obj == NULL) /*if the list is empty insert obj into the first node*/ {
list->obj = newObj;
free(temp);

[Code] ....

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C :: Sorted Linked List

Apr 2, 2013

I been ask to create a sorted linked list module, and to test each function with 1 unit, 2 +.so i wrote my addtofront function( we have to use the same as the teacher)

Code:

struct MyList{
char * name;
Sorted * AddmyChar;
struct MyList * next;
}

[code]....

but i cant seem to test it because it always display a seg fault.... i dont know what i did wrong....how do i call this function in main to display a string i want?

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C/C++ :: Adding Linked List In Sorted Order

Sep 22, 2014

I am currently trying to add to a linked list in sorted order but I have reached an impasse. I can get it to add in sorted order if it belongs in the beginning or second in the list. If i were to type in 9 then 4 i would get 49, but if i type in 5 it changes it to 559. I'm just at a loss and need some sort of direction.

#include "singly_linked_list.h"
#include <iostream>
using namespace std;
void add_node(node*& head_ptr, const int& payload){
if (head_ptr == nullptr) {
node* my_node = new node();
my_node->data = payload;

[Code]...

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C++ :: Program Crashes When Reading Linked List From File?

May 5, 2013

Why program crashes when reading linked List from file?

#include <iostream>
#include <fstream>
using namespace std;
struct link{
int data;
link* next;

[Code] .....

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C :: Reversing Every K Nodes Of Linked List - Program Crashes While Running

Mar 11, 2013

The code below is for reversing every k nodes of the linked list. While running the Program it crashes.

Code:
#include<stdio.h>
#include<stdlib.h>
struct node {
int info;
struct node *next;

[Code] ....

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C :: Sorted List - Why Value Of Void Pointer Change

Feb 16, 2014

I have a the following in a header file.

Code:

struct SortedList{
void * data;
struct SortedList * next;
struct SortedList * previous;
int (*compareFunc)(void *, void *);
void (*destructor)(void *);

[Code] ....

In a .c file, I implemented the SLCreate function.

Code:
SortedListPtr SLCreate(CompareFuncT cf, DestructFuncT df){
struct SortedList item;
item.data = NULL;
item.next = (struct SortedList *) malloc(sizeof(struct SortedList));

[Code] ....

In main.c, I try to do the following:

Code:
SortedListPtr list = SLCreate(&compareInts, &destroy);

A bunch other code that does not alter list or it's contents at all.

struct SortedList item = (*list);
void * data = item.data;
if (data != NULL) {
printf(Why did data become not null???
"); }

How come my variable data became not null anymore when I haven't altered it at all....

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C :: List Of Words That Need To Be Read In From A File And Then Sorted

Apr 4, 2013

I'm given a list of words that need to be read in from a file and then sorted. I was given a certain way to do it .

Code:
#include <stdio.h>
#define MAX 100
void print_ar(char x[][MAX], int size);
int strcomp(char x[], char y[]);
int strlength(char x[]);
void selection_sort(char c[][MAX], int size);
void strcopy(char x[], char y[]);

[Code] ...

Here are some words from the list

school
aibohphobia
lists
alula
bake
cammac
civic

I cannot figure out what is wrong at the moment. .

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C Sharp :: Error Concerning Sorted List Not Being Accessible Due To Its Protection Level

Oct 7, 2012

For school we have to create a blackjack game using windows form. I had to store the images of each card into a sorted list so i created a class called cardList and created a constructor which contained the the sorted list called cards. So it looks kinda like this:

public class cardList : Form1
{
SortedList cards = new SortedList();  
public cardList()

[Code]....

There's probably a few other errors, I'm still trying to figure this whole c# thing out. why the error tells me (on the line that contains c.cards.GetByIndex(cardNumber);) that cards is inaccessible due the its protection level.

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C++ :: Pointers And Arrays - Program To Display Sorted List And Average Of Scores With Appropriate Headings

Apr 22, 2014

I am writing a class that dynamically allocates an array that holds a user-defined number of test scores (test scores go from 0 to 10 both included). Once all the test scores are entered and validated (values only between 0 and 10, both included), the array should be passed to a function that sorts them in ascending order. Another function should be called that calculates theaverage of all the scores.The main program should display the sorted list of scores and the average of the scores with appropriate headings.

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C++ :: Creating A Linked List Of Common Elements From Two Other Linked Lists

Apr 29, 2013

I'm trying to write a function that takes two linked lists and creates a third one with only the common elements.

It assumes the first list (the caller) has no dups, but it doesn't seem to be working. The program doesn't crash, it just hangs when it is supposed to display L3 (the third list)..everything else runs and is displayed fine.

template <typename T>
LList <T> LList <T>:: common (LList <T> &B)//common fct
{
Node <T> *hunter1 = Head;

[Code]......

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C :: Insert Linked List Into Another Linked List

Jun 29, 2013

I have a linked list comprised of chars like so...

Code:

node1 - "p"
node2 - "o"
node3 - "p"

I need a function that will take in three perameters...node *replaceChar(node *head, char key, char *str)Stipulations of this function. head is the head of the list, 'key' and 'str' are guaranteed to contain alphanumeric characters only (A-Z, a-z, and 0-9). str can range from 1 to 1023 characters (inclusively). So if I call this function with these perameters..

Code:

node *head == /*the head of the list to be examined*/
char key == "p"char *str == "dog"The new list will look like this...
node1 - 'd'
node2 - 'o'
node3 - 'g'
node4 - 'o'
node5 - 'd'
node6 - 'o'
node7 - 'g'

All instances of 'p' were replaced with 'dog' I have a toString function which takes in a string and converts it to a linked list and returns the head. So assume that you can call the function on str = "dog" so...

Code:

toString(str) == /*this will return the head to the list made from the str*/

If it's unclear what my question is...I am stumped on how to write the replaceChar function the one that takes in three perameters..

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C :: Linked List / Adding Element To Beginning Of List

Dec 31, 2014

Code:

// Write a function called insertEntry() to insert a new entry into a linked list.

Have the procedure take as arguments a pointer to the list entry to be inserted (of type struct entry as defined in this chapter), and a pointer to an element in the list after which the new entry is to be inserted.

// The function dveloped in exercise 2 only inserts an element after an existing element in the list, thereby prenting you from inserting a new entry at the front of the list.

(Hint: Think about setting up a special structure to point to the beginning of the list.)

#include <stdio.h
struct entry1 {
int value;
struct entry1 *next;
};

[code]...

This is a working version of the exercise, but I don't think I'm doing what's asked. I was able to add an element to the beginning of the list using an if statement, not creating a special structure that points to the beginning of the list. How would I go about creating a special structure that points to the beginning of the list to add a new element at the beginning of the list?

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C++ :: Linked List Delete List?

May 30, 2013

I'm working on a linked list and was wondering how this looks to everybody else for a deleteList function.

void deleteList(Node* head)
{
Node* iterator = head;
while (iterator != 0)

[code].....

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C :: Doubly Linked List

May 15, 2013

I need to make the functions using these function prototypes. I am mainly having problems with GetFirst() and SwapData() but how to do it..

Header File with Prototypes
Code:
#ifndef LINKEDLIST_H
#define LINKEDLIST_H
/**
* @file
* This file provided a doubly-linked list implementation capable of storing any arbitrary data.
* The list implementation relies on a chain metaphor: a list is merely a sequence of links
* (ListItems) and there is no separate construct to represent the entire list, each ListItem in it

[Code]....

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C :: Linked List Search

May 7, 2013

I read an article on linked list here: C Linked List Data Structure Explained with an Example C Program

Code:

struct test_struct* search_in_list(int val, struct test_struct **prev)
{
struct test_struct *ptr = head;
struct test_struct *tmp = NULL;
bool found = false;
}

[code].....

What is "if(prev)"? Wouldn't "prev" always have the same value? Secondly, if tmp is NULL (which will be the case when the loop if(ptr->val == val) finds a match the first time it is run), is *prev assigned a NULL?

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C :: Double Linked List

Jan 2, 2014

I'm having a small issue here with my linked list.I built a linked list with strings and it worked perfectly.Now since i'm using strtok() to separate the string.for now here's what i've got:

Code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
typedef struct dict_word *word;
typedef struct node *Node;
typedef struct double_linked_list *DLL;
}

[code]....

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C :: Static Linked List

Jan 6, 2014

I have the codes for the functions: "Given the functions that we have discussed and defined in the class and the code that we have created, create the code for the Delete Node function and the Search function. Create an application that will incorporate all the functions that we have discussed and the new ones that you need to create. The application should allow the linked list to be built initially from a text file. The application should then allow for the user select an operation to perform. The acceptable operations are

- to search for an item
- to delete an item
- to enter a new item
- to exit the application

After the initial build and loading of data from the textfile, the application should print a listing of each item in the list and the node that it is located in. after a delete or insert, the application should display an output of the list again showing each item in the list and the node that it resides in.

The data item for this problem will be the inventory structure that we created in class and the data is in the inventory file that you already have downloaded."

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C :: Singly Linked List

Mar 7, 2013

I am having difficulty getting my program to run. I have looked and looked many times trying to figure out what I am doing wrong. I have a hunch that it's my load function that's acting up, but from my perspective, my creation of my singly linked list looks good. From the creation of my singly linked list, does anything stand out as being abnormal?

Code:

typedef struct Node {
char word[LENGTH+1];
struct Node *Next;
} Node;
}

[code]....

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C++ :: Linked List Using Templates

May 27, 2014

I decided to make a linked list program using classes and templates.I implemented my linked list and added some basic functions, everything worked just fine. Then I proceeded to add templates...First, the error list:

#pragma once
template<class T>
class Node {
private:
Node* next;

[code]....

To sum up: Something's wrong with the templates that I used in "List.cpp" and what it could be.

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C++ :: Linked List Won't Take Big Numbers

Jan 2, 2013

My program is almost done all that is left is entering big numbers, the program can add and subtract small numbers but not big numbers because it puts them all in one node, I need the program to store each number in a node.

#include<iostream>
#include<string>
using namespace std;
class Node {
public:
int value;
Node * next;

[Code] .....

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C++ :: Traversing A Linked List

Mar 30, 2013

When I am traversing a linked list ...i suppose we can do it only with pointers

like p is a head node pointer then

p
p->next
p->next->next
p-next->next->next

so on represents a link...

if i have to pass head node as struct variable itself...can i traverse a link using dot operator??

p and p.next and how to retrieve third and remaining links through this method if we can traverse like this???

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C++ :: Merging Two Linked List Into One

Mar 3, 2014

I have created this program to merge two linked list into one ,but however everything is working fine but on execution it providing a segmentation fault error ( on calling merging function )

code :

#include<iostream>
#include<stdio.h>
using namespace std;
struct node{
int data;
node* link;

[code].....

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C++ :: Mid Of Stack Using Linked List

Apr 1, 2013

I am unable to make any logical algorithm to access middle of stack. I am using stack implemented with linkedlists, I have following functions available for stack like push,pop,top.

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C++ :: Remove 0 At The End Of The Linked List

Sep 22, 2013

I had ...

class List;
List *deletezeroendlist(List* L);
class List {
public:
intdigit;
List*nextDigit;
public:
List():digit(0), nextDigit(NULL){}
List(int d, List *next):digit(d), nextDigit(next){}

I have tried many different ways but it is still not the answer / perform the function List *deletezeroendlist(List* L)

EX

L=12345600 -> L=123456
or L=01203000 -> L=01203

remove the 0 at the end

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C++ :: Reversing Linked List?

Sep 12, 2013

Code is:

#include<stdio.h>
struct node {
int info;
struct node *next,*prev;

[Code] ....

How to reverse a linked list .....

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C++ :: How To Make A Linked List

Apr 6, 2013

How can you make a linked list without having to write

node *head = NULL;
head = new node ( "zildjian" );
head->next = new node ("sabian");
head->next->next = new node ("paiste" );

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