C :: Reversing Linked List In Reverse Order Using Recursion

May 3, 2014

I was trying to reverse a linklist in reverse direction using the recursion. I was able to reverse n - 1 element but it is not printing the first one. Below is my code.

Code:

typedef struct linklist {
int data;
linklist *next;
};

void add(int data,linklist **node) {

[code]....

This is happening since recursion is starting from second node, which is due to reason not printing the first one when recursion print values from stack once

node != NULL

Condition is met.

Currently I am using below statement for printing the first element;

reverse_recur(node);
printf("
Print In Reverse Order
%d
",node->data);

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C++ :: Implementing Recursive Function To Print Linked List In Reverse Order

Nov 29, 2014

Implement a recursive function named void printBack(DoublyLinkedNode<T>* node) for the class DoublyLinkedCircularList which will print out the elements in the list from back to front. The function is initially called with the first node in the list. You may not make use of the previous(prev) links

This is my solution where I got 2 out of a possible 3 marks:

template<class T>
void DoublyLinkedCircularList<T> :: printBack(DoublyLinkedNode<T>* node) {
if(node->next == NULL) //Correct- 1 mark
return 0;
else
printBack(node->next); //Correct - 1 mark
cout << current-> element << " ";
}

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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/C++ :: Reversing A Circular Doubly Linked List

Apr 25, 2015

I 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].....

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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++ :: Recursion With Linked List

Aug 28, 2013

I have a linked list I made and am practicing a simple recursion function sum() which returns the sum of all numbers in each node of the list. Here is my sum() function:

int sum(ListNode *ptr){
if (ptr->next)
return (ptr->num + sum(ptr->next));
else
return(0);
}

where the initial arg passed through the ListNode * parameter is my head node (with null value). The output is fine until that point, then the program locks up and I get the "...has stopped working" error.

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C/C++ :: Recursion Using Linked List

Apr 28, 2014

I have been asked to write three functions for a Liked List that can add remove and reverse the elements of the Linked List. Now, I have done the add function and It is displaying the elements properly using recursion function. But My removal function is not working and I tried all the possible logic I can think of, I dont know, where did I make mistakes.

This is My class for the Linked List

#ifndef __Linked_Lists_Recursive_function_Implementation___NumberList__
#define __Linked_Lists_Recursive_function_Implementation___NumberList__
#include <iostream>
using namespace std;

[Code]....

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C :: Reversal Of Doubly Linked List Using Recursion

Mar 6, 2015

I am trying to reverse a Linked list using recursion but whenever I try to print it after reversal it prints only the last element of the list.

Code:
void reverseRecursive(Node **root, Node *temp)
{
Node *next = temp->next;
if(temp->next == NULL)
{
*root = temp;

[Code]...

I have just posted the reverse function to enable easy readability rather than post the entire code

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C++ :: Linked List - Recursion For Search Function

Mar 19, 2013

I have a linkedList search function given and I am having a little trouble getting it to work. I've made a few attempts with no success. Given normal search code:

template <class Type>
bool orderedLinkedList<Type>::search(const Type& searchItem) const {
bool found = false;
nodeType<Type> *current; //pointer to traverse the list

current = first; //start the search at the first node

[Code] .....

My attempt to make it a recursive search:

template <class Type>
bool orderedLinkedList<Type>::search(const Type& searchItem) const {
//bool found = false;
nodeType<Type> *current; //pointer to traverse the list
current = first; //start the search at the first node

[Code] ....

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C++ :: Read List Of Numbers From A File And Then Print Out In Reverse Order

Apr 6, 2013

1. Construct a class diagram that can be used to represent food items. A type of food can be classified as basic or prepared. Basic food items can be further classified as meat, fruit, veg or Grain. The services provide by the class should be the ability to enter data for new food, to change data for food and to display existing data about food.

using this class definition write a main program to include a simple menu that offers the following choices:

1. Add food
2. Modify Food
3. Delete Food
4. Exit this menu

2. Read a list of numbers from a file and then print them out in reverse order. State whether the list is palindromic or not.

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C :: How To Reverse Unidirectional Linked List

Sep 12, 2014

I was assigned to reverse a unidirectional linked list in C, where I'm not allowed to make a copy of the given linked list, or to change the actual data.

The only thing I'm allowed to do is to manipulate the list's pointers. After doing some thinking and scribbling on a piece of paper, I came up with this:

Initialize three pointers: p1,p2,p3, for the first, second and third elements, respectively.
p1->next=NULLwhile (p3 != NULL) do p2->next=p1p1=p2p2=p3p3=p3->nextp2->next=p1return p2
as the head of the reversed list

This is a pseudo code, of course, as I'm less interested in the actual implementation, and more about the algorithm itself. I was wondering if there's a more elegant way of doing this, since this gets quite complicated considering the cases where the list has less than three elements in it.

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C :: Create A Linked List And Then Reverse It?

Apr 9, 2014

I am trying to create a linked list and then reverse it. So far I have created the link list however I am having difficulties figuring out the steps to reverse it. What is the logic behind reversing this linked list. I am not able to use recursion. I am supposed to create a copy of the linked list with the nodes reversed.

Code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
struct charNode {
char data;
struct charNode *nxtNode;
};

[Code]...

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C++ :: Doubly Linked List Reverse

Sep 13, 2013

my code is

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

[Code] ....

I have reversed a linked list it is reversing but additional two elements 0,0 are coming, whats going wrong....

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C/C++ :: Print Name And Ages Forward Then Reverse Using Double Linked List

Apr 28, 2015

I have to write a c program that will allow the user to enter names with ages. The name will be no longer than 40 characters. The name and age should be stored in a node of a doubly linked list. I cant use global data. I need to use 3 subroutines. the first one needs to enter the data and pass the head and tail pointers to the subroutine. the next subroutine needs to print the names and ages to the screen and file output.txt from first to last. the last subroutine needs to print out names and ages to the screen and file output.txt from the last to first.

Im getting several errors when i try to run this program. The first subroutine to get the data from the user and build the double linked list. but i seem to be having issues.

#include <stdio.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
int entry(char [][41], int []); // subroutine used for data entry //
void printit(char [][41], int [], int); // subroutine used for data printing //
void reverseprintit(char [][41], int [], int); // subroutine used for reverse data printing //

[Code] .....

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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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Apr 18, 2013

At the line number 65 that's my sort method first i sum up all the value in the nodes after that i want to sort the Nodes In ascending order but the method is not working ...

#include <iostream>
#include <conio.h>
using namespace std;
// Node Class

[Code] ....

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C++ :: Singly And Doubly Linked List - Order Inserted Elements According To Certain Pattern

Sep 13, 2014

I need to make singly and doubly linked list classes that can insert elements. Once the lists are created, I need to order the linked list elements according to a certain pattern.

order2 pattern:
input: 0 1 2 3 4 5 6 7
output: 1 0 3 2 5 4 7 6

order3 pattern:
input: 0 1 2 3 4 5 6 7 8 9 10 11
output: 2 1 0 5 4 3 8 7 6 11 10 9

sequence order pattern:
input: 0 1 2 3 4 5 6 7 8 9 10 11 12 13
output: 1 0 4 3 2 8 7 6 5 13 12 11 10 9

reverse pattern:
input: 0 1 2 3 4 5 6 7 8 9
output: 9 8 7 6 5 4 3 2 1 0

My instructor has given the description of the required classes in a file interfaces01.h as:

#pragma once
#include <cstdlib>
struct ISingleNode {
ISingleNode() {}
virtual ~ISingleNode() {}
virtual void setValue(int value) = 0;
virtual int getValue() = 0;

[Code] ....

However when I am compiling these files in vs 2013 I am getting the error: cannot open include file Singlenode.h,Singlelist.h.

Also I am not too sure about the sorting and reverse logic. How can I implement these logics.

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May 14, 2014

How to print a string in reverse order(for example: "today is Wednesday " to "Wednesday is today"). My professor said we should begin with a null string and build it one word at a time.

#include <iostream>
#include <fstream>
#include <string>
using namespace std;
int nwords(string);

[Code] .....

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Jun 3, 2013

I need to do program where i will input sentence and then output it in reverse order. Example: today is Monday ----> Monday is today. So I have this:

#include <iostream>
#include <cstring>
using namespace std;
int main() {
char niz[20],niz2[20];
int lenght,k=0;

[Code] ....

For output I only get one word of sentence,example: Monday is today--->today and nothing else.

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C++ :: Two Vectors Of Float - Sorting In Reverse Order?

Jul 15, 2013

I have two vectors of float that I need to sort in reverse order. reverse() seems to work for one of them, but not the other. I have toggled between sort() and reverse(). for one vector, the expected behavior is seen and the order reverses. For the other, there is no change in order.

This is very simple code, so it's hard to imagine what is going wrong.

Code:
vector<float> vec1, vec2;
vec1[0] = 14.1102; vec1[1] = 14.1145;
vec2[0] = 15.8508; vec2[1] = 26.0842;
sort( vec1.begin(), vec1.end() );
sort( vec2.begin(), vec2.end() );

[Code] ......

Printout is,

Code:
vector 1 sort
14.1102
14.1145
vector 2 sort
15.8508
26.0842

vector 1 reverse
14.1102
14.1145
vector 2 reverse
26.0842
15.8508

You can see that the order of the first vector did not change. Am I right in suspecting that the numbers are too similar for what ever method reverse() uses to determine the difference between values?

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Nov 5, 2013

works fine without the for loop.... if i use for loop...it doesnt give the output...

Code: #include<iostream>
#include<conio.h>
#include<fstream>

[Code]....

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Sep 24, 2013

The next step for my project is to take data from a file, and create a new file with the same data, but in reverse order. If a file has the following values:

1
2
3
4
5

The program should create a new file with the following values:

5
4
3
2
1

Seems pretty straight forward, yet I am hitting a snag when I try to compile my program:

Code:
#include <stdio.h>
#include <assert.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/types.h>

[Code] ....

The following errors occur when I try to compile the fore mentioned code:

intrev.c: In function 'main':
intrev.c:25: warning: unused variable 'out'
intrev.c: At top level:
intrev.c:39: error: expected identifier or '(' before 'while'

[Code] .....

Now I am not concerned with "unused variable 'out'" as it is used, just in a for loop. Is this a problem?

I'm not entirely sure why it's giving me the error at line 39. I've gone over this a couple times and it doesn't look like I've missed any methods which need to be closed. Maybe I've missed something?

I'm also not sure why I am getting an error when I try to close the opened files. I've done this before in the same manner, but without errors. Not sure why I am now, but my guess is that it has something to do with the error on line 39.

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Jan 5, 2015

Need to correct the errors. i've done so far.

#include<iostream>
#include<fstream>
#include<cstdlib>
#include<iomanip>
using namespace std;
int main() {
ifstream fin; char ch; int size=0;

[Code]...

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Dec 1, 2014

I need fastest method to reverse order of bytes in my char array.

For example i have:

unsigned char buf[8];
// consider data stored in buf is 88 77 66 55 44 33 22 11
// how to reverse it to: 11 22 33 44 55 66 77 88
// currently i can do it by equal assignment , i make another buf like:
unsigned char buf_ok[8];

[Code] ....

// This does reverse the bytes as i want but its very slow , i am looking for fast method ..

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Apr 17, 2012

I am having to write a program that takes 2 sorted linked lists (x and y) and merge those to sorted into a third one (z). This has to be done via recursion. I think I am close but there is a logic error.

Code:
void SortedMergeRecur(Node*& xHead,Node*& yHead,Node*& zHead)
{Node* temp = 0;
if(xHead == 0) {
zHead = yHead;
yHead = 0;
}

[Code]...

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Apr 2, 2012

I am trying to write a program that takes a sentence and reverses the word order.

For instance This is a Bird would become Bird a is This

Code :

#include <stdio.h>
#include <string.h>
#include <ctype.h>
int main (void) {
char input_buffer[1024];
char middle[1024];

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