C++ :: Linked List Output Incorrect?

Oct 30, 2013

Were are to implement a method countValue() that counts the number of times an item occurs in a linked list. Remember to use the STL <list>

int countValue(list<int> front ,const int item);

Generate 20 random numbers in the range of 0 to 4, and insert each number in the linked list. Output the list by using a method which you would call writeLinkedList which you would add to the ListP.cpp.

In a loop, call the method countValue() , and display the number of occurrences of each value from 0 to 4 in the list.

Remember that all the above is to be included in the file ListP.ccp

The output should be:
2 3 4 0 1 0 2 4 2 3 3 4 3 3 3 0 0 2 0 2

0 : 5, 1 : 1, 2 : 5, 3 : 6, 4 : 3

but I am getting:

1 2 4 0 4 4 3 3 2 4 0 0 1 2 1 1 0 2 2 1

0 : 4, 1 : 5, 2 : 5, 3 : 2, 4 : 4,

Here is my code:

#include<iostream>
#include<list>
using namespace std;

[Code].....

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C/C++ :: Output From Array Is Incorrect?

Apr 25, 2015

I am writing a program where I read in data from a file into an array and a 2D array. However, when I cout that data to insure that it was all read in correctly, I get only the first full line of that input file(where there are actually 25 rows and 12 columns).

What am I doing wrong or should be doing differently?

ifstream fin;
//open the input file
fin.open("store_data.txt");
//If input file was opened, read input file data into array and 2d array
if(fin){

[code]....

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C++ :: Incorrect Vector Output Loop Error

Nov 21, 2014

My loop is outputting data incorrectly. I have inbound web data that come in sets of 7. I am trying to in insert the 7 records into a vector and then display the vector content followed by a new line.

Code:
char buff[BUFSIZ];
FILE *fp = stdout;
char * cstr = buff;
vector<std::string> vrecords;
while(std::fgets(buff, sizeof buff, fp) != NULL){
for(int i = 0; i < 6; ++i){

[Code] ....

expected output:

Found buy!
198397652
2014-11-14 15:10:10
Buy
0.00517290
0.00100000
0.00100000
0.00000517

[Code] ....

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C/C++ :: Incorrect Output From Unsigned Binary To Decimal Program

Feb 2, 2015

This program has to convert an unsigned binary number into a decimal number. No matter what binary number I enter, however, it always outputs that the decimal number is 0.

My code is as follows:

#include <iostream>
#include <cmath>
#include <algorithm>
using namespace std;
int main() {
string binarynumber;
cout << "Enter an unsigned binary number up to 32 bits." << endl;

[Code] ....

And my output:

Enter an unsigned binary number up to 32 bits.
00001111
That number in decimal is 0

The output should have shown the binary number in decimal to be 15, and I cannot find my error.

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C++ :: Merge Sort Implementation Giving Incorrect Output

Oct 25, 2014

I've implemented the merge sort algorithm and used the 'merge' part for counting the number of split-inversions in an array as part of an assignment for an online course. How ever, the out put array is not a sorted version of the input array and as a result the number of split inversions obtained is wrong. I think that there is some thing wrong in the way I am indexing arrays.

I've used ' cout ' to print the values of indexes to see exactly what values are being passed in during the recursions.

Code:

#include <iostream>
using namespace std;
int length=0,mid=0,inv=0;
void mergesort(int arr[], int first, int last) {
cout << "first: " << first << " " << "last: " << last;
cout << endl;

[code].....

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C/C++ :: Program To Find Index Of Character In A String Gives Incorrect Output

Oct 28, 2014

I've been typed out a C program to let the user define the size of their string , and key in characters for this string , the program would then prompt the user for a character to search for in the string and return it's index value. Eg. Index of c in abc is 2. My code is as shown:

#include<stdio.h>
#define SIZE 20
int search(char x[SIZE+1] , int n , char s);
int main(void){
char x[SIZE+1] , s;
int n , index;

[Code] ....

However , after I key in my characters for the string , the program does not prompt me to input a character to look for, it just prints it out and returns some funny number. But the program works just fine is I move this portion to the top :

printf("Enter alphabet to find: ");
scanf("%c",&s);

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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 :: 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++ :: 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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C++ :: Linked List Not Working?

Jun 28, 2013

#include <iostream>
#include <string>
#include <iomanip>

[Code].....

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C++ :: 2 Queue With Linked List?

Dec 6, 2014

while the prog. running compiler say " access violation .. "

this my code ...

solved :just forget to make r=NULL ; rf =NUll ; frontm=NUll; frontf=NULL ;

#include <iostream>
#include<conio>
struct stu{
int id;
float gba ;
char gender ;
stu *next ;
}*r ,*rf ;
stu read()

[code]....

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