C++ :: How To Create Array Of Nodes
Feb 10, 2015
I am trying to see if I can create an array of nodes. I think I have it down somewhat but this is what I have.
Code:
#include <iostream>
using namespace std;
/*This is a template of a person....sorta*/
class person{
public:
int data[32];
bool selected = false;
person(){
[Code]...
I am trying to see if there is a way for me to create a 86 slot array of person nodes. I am not sure how to do it and how to access them afterwards. I know that I am creating the bitstring of person correctly but I am not sure how to get the array of person going.
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Oct 19, 2013
I'm trying to sort the elements in a linked list which contain a variable amount of data in any given case. In the sample code, the code is more static, but I plan on adding it to much more dynamic code once I have it figured out. My main problem is that I am not sure how to sort the linked list while still keeping the correct pointers to the nodes. I thought about writing my own custom quick sort instead of using the C-standard library function, but how I would keep the pointers to the next nodes correct eluded me. Here is my code so far :
Code:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
[Code]......
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Oct 26, 2013
I have a struct called Array and I'm to create a function to create a dynamic array that's fill with randomly generated integers from 0 to 50 (inclusive) and a function to destroy the array for freeing its memory. Below the code that I have written so far.
Code:
* Struct */
typedef struct {int *pArray; //the dynamic array
int length; //the size of the dynamic array}Array;
/* Function to create a dynamic array */
Array *initializeArray (int length) {int i;
}
[code]....
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Nov 24, 2014
I got this program to create an array of playing cards and assign the values and suits and shuffle the array. I'm at the point where I need to output the cards but I need to burn the first card by making it output "**" instead of the card. my cards[] is a constant so I can's assign the first card as such.
void showCards(const int cards[], int numCards, bool hideFirstCard) {
if (cards[0]) {
hideFirstCard=true;
cards[0] = '**';
} for(int a = 0; a <= numCards; a++) {
cout >> showCard(cards[a]);
} }
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Jun 9, 2014
I have a adjacency matrix. (router adjacency matrix in network). The result should be the router ID.I mean, print all the possible paths from source router to target router(ROUTER id>> 1 - 2 - 3 - 4 so there are four one router). I get the error in the output.)
Code:
#include<stdio.h>
#include<conio.h>
/* graph: Pointer to the starting of mXn matrix
i, j: Current position of the robot (For the first call use 0,0)
m, n: Dimentions of given the matrix
pi: Next index to be filed in path array
[Code] .....
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Oct 9, 2014
so in this program i have two structs
struct node{
string data;
node* next;
node* prev;
};
struct list{
node* head;
node* tail;
};
one is just nodes for a doubly linked list and the other one stores head and tail pointer.
I am creating a function that creates the list and returns the list, (which will be a head pointer and a tail pointer).
list* read(string fn){
ifstream file(fn);
node* no;
string temp;
lista* bn;
bn = new list;
[Code]...
why is this not working?
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Feb 26, 2015
I created a bunch of nodes and I made each one before one another. Im having trouble adding another node to the last one.
#include <iostream>
using namespace std;
struct nodeType{
int info;
nodeType *link;
};
void printList(nodeType *head) {
nodeType *current = head;
[code]....
The node with the value of 400 is the node that has to be last.. How would that work?
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Oct 25, 2013
I'm implementing a quad tree for an assignment, and I'm not sure if every node should contain a list of pointers to every Point in its sub tree (implying the root node will contain all Points), or if only leaf nodes should contain the Points.
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Jul 23, 2014
I wrote function to add to elements in the list, but when I call printList function it returns me empty list ! I'm new with linked list in C
Output:
Empty list
List is empty add element at the begining
New node with packet num 245
List is not empty add element at the end
New node with packet num 486
Linked list: Empty
Main:
Code:
int main(){
struct node * start ;
start = NULL;
int i;
/*Check if list is empty*/
if(start == NULL){
printf("Empty list
[Code]...
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Oct 17, 2014
Ok so I am having difficulty adding nodes to my linked list....
how to add a third node while keeping track of the address...Thats where I get lost..I don't know how to keep track of the addresses of the next node..
#include <iostream>
using namespace std;
typedef struct Node{
[Code]......
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Jun 2, 2013
Draw a binary tree having 4 nodes and 3 leaves ...
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May 6, 2013
I am trying to count every node of a binary tree internally (not passing in the root), all my attemps have ended in memory access violation or an inaccurate count (4 or 5) when it should be 10.
This is what I have tried
And yes I am NOT suppose to pass in the root.
int CountChildren()
{
if ( !Left() && !Right())
return 1;
if ( Left() )
return Left()->CountChildren() +1;
if ( Right() )
return Right()->CountChildren() +1;
}
or
int CountChildren()
{
if(!Left() && !Right())
return 1;
else
return Left()->CountChildren()) + Right()->CountChildren() + 1;
}
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Nov 3, 2014
I'm trying to count the number of node in a binary tree. I have a public count function that calls a private count function. I keep getting a linker error: Undefined symbols for architecture x86_64:
"BST<int>::nodesCount(BST_Node<int>*, int&)", referenced from:
BST<int>::nodesCount() in main.o
This is in Xcode. It doesn't seem to like calling the private function in the public one, but I'm not sure why since I'm doing that with several other functions.
//public function
template <typename T>
int BST<T>::nodesCount()
{
[Code]....
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Apr 18, 2015
I'm simply trying to locate possible logic errors because if I could fill this list properly, I can finish my project very easily. This is just a small portion of a very immersive project.
I am trying to create a linked list that holds objects of type Location *. I have Location defined as
typedef struct location{
char *name;
char *longer;
char *shorter;
[Code].....
I wish to clarify but can not find where to edit the OP. I believe the list is still empty because I attempt to do a simple read through the list by accessing the head and then reassigning the list to the tail of the list. However, the program never enters the while loop
while(world !=0){
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May 1, 2014
How would I generate nodes inside a function for example I have a head node
Node * head = new Node;
Now I want to generate nodes for as long as the for loop is running
void CreateList(Node * h) {
for(int i = 0; i < 5; i++) {
Node * n1 = new Node;
head -> next = n1;
} }
Something like this but it should keep adding nodes to the list and change the head each time so how would I do this...
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Jul 14, 2014
Right now I'm working on a TreeView for which I would like to add a TextBlock and a ComboBox as child nodes of a Parent TextBlock node. This would look something like this:
My TreeView is implemented using an MVVM style, and utilizes a HierarchicalDataTemplate. I have had no problems with adding TextBlock nodes and TextBlock children, but the confusion seems to arise when adding child nodes of different UI types.
I have tried implementing a stackPanel, like so:
<HierarchicalDataTemplate DataType="{x:Type Data:Node}" ItemsSource="{Binding Teams}">
<StackPanel>
<TextBlock Text="{Binding IndividualProperty}" />
<ComboBox ItemsSource="{Binding CollectionProperty}" />
</StackPanel>
</HierarchicalDataTemplate>
But then I end up with each node looking like this. It's like each node comes with one TextBlock and a ComboBox (Note: The comboBox is not the child, it and the TextBlock are one node):
How do I allow my treeView to have child nodes of different UI types? I am thinking that my solution has to do with my Hierarchical Data Template.
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Apr 4, 2014
<?xml version="1.0" encoding="ISO-8859-1" ?>
<packets_summary>
<item>
<index>1</index>
<frame_type>Ethernet</frame_type>
<local_mac_address>00-21-85-11-29-1b</local_mac_address>
[Code] ....
I am having trouble to read all attributes in all nodes called "item". I can load all attributes in one node "item" but I can't move to another node called "item " and load another attributes . I was trying a lot of different codes but I did not succsed.
for (pugi::xml_node node = doc.child("packets_summary").child("item").first_child(); node; node = node.next_sibling()) { cout << node.name() << ": " << node.child_value() << endl; }
This code just print all of the attributes in node called "item" but i need to move to another one and I really don't know how. I was trying to put into one for cycle another one but it did not work.
for (pugi::xml_node node = doc.child("packets_summary").child("item").first_child(); node; node = node.next_sibling()) { cout << node.name() << ": " << node.child_value() << endl; }
for (pugi::xml_node node = doc.child("packets_summary").child("item").first_child(); node; node = node.next_sibling()) {
cout << node.name() << ": " << node.child_value() << endl;
}
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Dec 1, 2013
I am trying to create a box outside my 9x9 array. However, my box did not cover up everything.
Code:
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <conio.h>
#define row 19
#define col 19
[Code] ....
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Oct 16, 2013
I created a linked list, but I wanted to make sure it was storing each word appropriately and going over the text. It compiles and runs, so I know it works. I'm just not sure if it's doing what I want...
Code:
#include <stdio.h>
#include <stdlib.h>
//creating the linked list
struct node {
[Code].....
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Oct 25, 2013
I 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] ....
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Mar 27, 2014
I am coding a singly-linked list container. Of course, internally it uses Node<T>.
Question: what is the correct way to use the allocator given by the user? I ask, because I've read this on the rival C++ Reference:
std::list<T, A> allocates nodes of some internal type Node<T>, using the allocator std::allocator_traits<A>::rebind_alloc<Node<T>>, which is implemented in terms of A::rebind<Node<T>>::other if A is an std::allocator
[URL]...
The above doesn't seem right to do, because then what should pointer and const_pointer be?
using pointer = std::allocator_traits<Alloc>::pointer;
using const_pointer = std::allocator_traits<Alloc>::const_pointer;
// but we're using Alloc<Node<T>> not Alloc<T>
// so maybe do this?
using pointer = value_type *;
using const_pointer = const value_type *;
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Oct 22, 2014
I am working on a program where I sort elements into alphabetical order and then when one is less than the other I swap them. I first did it by swapping the data but they want me to swap the nodes instead and I am having trouble doing that.
Node *add_node( Node *list, const string &s ) {
struct Node *n = new struct Node;
n->word = s; // copy string s to word
n->next = 0;
// add node n to the list
// the list should always be in ascending alphabetical order
n->next = list;
list = n;
[Code] ....
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Jun 25, 2014
I am creating a Linear linked list in c++. I've written all the functions for it, but now I want to try and do them using recursion.
I managed to make functions for adding and displaying nodes on the list, but I am stuck on the function for removing nodes. First I want to try and write a function the removes the last item on the list. But for some reason my code isn't working properly.
Here is the code :
void removeLastItem(node * &head) {
if(!head) {
delete head;
head = NULL;
[Code] ....
NODE - My structure name
NEXT - The pointer to next element.
HEAD - The first (head) pointer.
The couts in the if statements are just for testing. In fact after I Run my program it does as it is supposed - enters the second if /b]case as many times as there are elements and then executes the first [b]if statement. But for some reason it does not delete the actual node.
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Feb 9, 2013
I am working on a linked list that instead of the traditional integer value for a data, i'm using my own class. Unfortunately when i do this, i cant seem to retrieve my data from my Node.
#include "Customer.h"
class Node {
// TO DO:: Fill in.
//Constructors and destructor
public:
Node();
Node(int atime, int ttime);
Node(int atime, int ttime, Node* nd);
[Code] .....
In my main code, I've been trying something like
Node* c = new Node(1,2)
Customer x = c->cust; // or Customer x = c->get_cust();
cout<<x.get_atime()<<endl;
cout<<x.get_ttime()<<endl;
It should be displaying 1 and then 2, but just outputs 0 and 0.
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Nov 15, 2014
I've been working on this linked list priority queue . I know that the root of the problem is in my swapUp() function (swapping the positioning of two nodes based on their priority), because the list works great up until it is called. The seg fault is not actually being caused by swapUp(), it's being caused by peekAt(), which returns the element in the node at position n. But the error does not occur unless swapUp() is called first, so that is where the issue is (I think).
There is also a seg fault being caused in the destructor, which I believe may have the same root cause in swapUp().
PRIORITY QUEUE:
#ifndef JMF_PriorityQueue
#define JMF_PriorityQueue
#include <iostream>
#include <string>
template <typename T>
class PriorityQueue{
[Code] .....
Okay, so I've tried implementing SwapUp() in a different new way, but it's still giving me the same problem
template <typename T>
void PriorityQueue<T>::swapUp(Node * target){
Node * partner = target->next; //Partner = target next
[Code] .....
This is such an elementary logic problem I don't know why I'm having so much trouble with it.
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Dec 19, 2014
Is it possible to create an 8 dimensional array in C? If no, then what can I do to improvise or let say bypass the limit?
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