C/C++ :: AVL Tree - Node Insertion
Apr 4, 2015
I am working with A.V.L. trees at the moment and I have to implement a program that inserts a node and if needed re-balance the tree.I have problems when I have to do a double rotation because after I insert a node the tree is messed up. This is a picture with what my program shows after i run it. [URL] .....
void length(NodeT* p,int *maxi,int l) {
if (p!=NULL) {
length(p->left,&*maxi,l+1);
if ((p->left==NULL)&&(p->right==NULL)&&(*maxi<l))
*maxi=l;
length(p->right,&*maxi,l+1);
[Code] .....
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Apr 22, 2015
I am working on C# Project [Windows Form Application], to update treeview nodes from excelsheet [xls] Cell [row i, Column 3] Values, while on selecting treenode, it should update corresponding Column 4 Value [row i, Column 4]. For me, Treenode are populated successfully, but on selecting the treenode, it always display first Element of treenode [Not selected one].
Populated Treenode from Excel as: [ Update Child Nodes from Column 3 elements [Column 2 Contain Parent node name and Column 3 have Child Node name], if Column 2 Value is same as Parent node name [My Module], update the child nodeunder same Parent node.]
for (int i = 0; i < worksheet.UsedRange.Rows.Count; i++) {
string mynode = ((Excel.Range)worksheet.Cells[i + 1, 3]).Value2.ToString();
string mynode2 = ((Excel.Range)worksheet.Cells[i + 1, 2]).Value2.ToString();
[Code] ....
On selecting the Child Node, it always give 1st Parent node. Instead of Selected Node.
for (int i = 0; i < worksheet.UsedRange.Rows.Count - 2; i++) {
string mynodetext = ((Excel.Range)worksheet.Cells[i + 2, 3]).Value2.ToString();
string mynodetext1 = ((Excel.Range)worksheet.Cells[i + 2, 4]).Value2.ToString();
if (treeView1.SelectedNode.FirstNode.Text == mynodetext) {
this.richTextBox1.SelectedText += Environment.NewLine + mynodetext1 + Environment.NewLine;
}
}
How to get correct selected Node.
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Aug 30, 2013
While 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.
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Dec 24, 2014
I'm currently working on a Microsoft (unmanaged) C++ project which utilizes Boost C++ libraries. It's been quite a while since I've done C++ and I have no previous experience using the Boost libraries.
We are using Boost 1.55 and MSVC 2013. We used CMake to generate the Visual Studio solutions and projects based on the original project layout.
We've successfully built and tested on other environments. In the MSVC - Windows environment, we've run into issues using Boost's Property Tree support. Specifically, the issue seem to center around trying to put properties into PTNodes.
Consider the following code snippet:
void XXX:: SomeFunction() {
PTnode ptNode;
ptNode(Mapper::KEY_INPUT, Tracer::SOME_VALUE);
ptNode(Mapper::KEY_OUTPUT)(Tracer::SOME_OTHER_VALUE, Tracer::ADDITIONAL_VALUE);
SetResults(ptNode);
[Code] ....
This work around seems insert the nodes successfully into the tree.
We are able to verify by finding the inserted items in ::SetResult().
Why this might be failing in VisualStudio C++?
Is this an issue of compiler flags?
precompiler definitions?
Linker options??
Memory mode/model??
Are there some basic behaviour differences in MSVC C++ and other C++ environments which we are unaware of?
I've tried to identify all instances of the node insert pattern and use the work around. But, we really need to find out what the issue is (as there could be other manifestations).
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Feb 24, 2014
I need to set a parent for each new node being inserted but I can't get to incorporate that into my insert function.
Here's a part of my code:
struct bst_node {
string value;
T key;
bst_node<T> *left;
bst_node<T> *right;
bst_node<T> *parent;
[code].....
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Feb 18, 2014
I am having trouble with my deleteNode function, using recursion I am trying to delete a node from a binary tree. My tree is displayed as the following...
Tree: (node)->[left child, right child]
(k)->[g,p]
(g)->[c,h]
(c)->[ ,e]
[Code]....
The result did show that it is erased but when I try to add the erase node "t" back into the tree it still exist. I am stumped on what to do when using recursion way of deleting node.
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Nov 14, 2014
It seems that I can't delete a node without children....
#define TRUE 1
#define FALSE 1
typedef struct binary_tree_nodes_t {
struct binary_tree_nodes_t* right;
struct binary_tree_nodes_t* left;
[Code] ....
Should my search_node function return this : binary_tree_nodes**
So I can get the address of pointer , is this causing my problem ?
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Dec 5, 2013
How would I delete the largest node in a binary search tree recursively???
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Apr 3, 2013
This is the delete function of binary search tree. However it won't enter the if-else statement that checks whether the node to be deleted is the left child or right child.
void DeleteNode(node* T, int number) {
node* x = new node;
node* current = new node;
node* dele = new node;
node* finder = new node;
finder = root;
[Code] ....
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Sep 5, 2014
Below is my implementation of a Binary Search Tree, but there is a bug in the DeleteNode() function. It does not set the parent's pointer to NULL as I intended.
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Jul 28, 2014
I have my tree, and I need to find the number in the tree (given by the user) and get the distance between the node found and the root.
What I've done so far is this, but I don't think it's correct.
void BinarySearchTree::find() {
system("cls");
BinarySearchTree b;
int num;
tree_node* cur;
[Code] ....
I founded the node, but I don't know how to determine the distance.
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Dec 4, 2013
How would I remove the largest node in a Binary Search tree?
function prototype:
boolean remove_largest(node *& root)
{
}
I know that if there's no right child, then the root node has to be deleted. If there is a right child, then traverse that path for the largest node. But how to make this in to code that works?
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Jun 26, 2012
I'm trying this to get the hang of boost::shared_prt and weak_ptr so far I have the following
Code:
#include <iostream>
#include <string>
#include <boost/thread.hpp>
#include <boost/lambda/bind.hpp>
[Code] .....
My questions are, is the tree class defined correctly? How do I find the parent of a given node? And how does the insert part will work?
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Mar 22, 2014
how can a breadth-first-search-tree include every node have ancestor list. every node have multiple ancestor list(because every node may be multiple parents)
input: undirected graph
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Jul 26, 2014
I'm having a hard time figuring how to get my imagelist index 3 icon to display in the nodes "N1" and "V Speeds" below? So, as you can see in the attachment, the closed folder icon is currently shown which is index 0 in the imagelist. But I want index icon 2 to show in these two nodes.
treeView.BeginUpdate();
treeView.Nodes.Clear();
treeView.Nodes.Add(new TreeNode("Checklist"));
[Code].....
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Oct 31, 2014
I want to find maximum element from a tree (not a binary tree ) ???? ...using c language...
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May 21, 2013
I have a very big xml file. I read it using by xmlReader. I have problem when i reach to next line:
<title>Abasia<nemod>(-astasia) (hysterical)</nemod></title>
How I can read all that content. I have to have next string at the end: "Abasia (-astasia) (hysterical)".
I tried to use ReadElementContentAsString() for all elements, but elements like this has exception, because it has child element.
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Feb 7, 2014
Here is the most recent failure of trying to insert a text file into an AVL tree. The text file has a word or phrase of each line.
like:
apple
orange
blueberry
cookie
car
hat
This is the function that isn't working.
void fillTree(avl_node *root){
ifstream inp("words.txt");
if(inp){
[Code]....
I know that the getline() can have a deliminator parameter but since there is no commas should I put an newline deliminator? Would that be ? And I know that the insert() function works.
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Aug 25, 2014
Suppose multiple threads are are trying to insert into a STL Map, both are trying to insert with same key. As per my understanding it will not cause any issue till you invalidate the iterator. Here as per me it will not invalidate the iterator.
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Apr 7, 2014
Can validate if my code implements the concept of insertion sort. The program is executing successfully. Just need a verification!
Code:
int i,j,k,a[100],n,num,min,max,temp;
printf("Enter array size: ");
scanf(" %d",&n);
printf("
Enter the numbers:");
for(i=0;i<n;i++)
scanf(" %d", &a[i]);
[Code] ....
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Mar 4, 2014
I have been working on a program that records the time it takes the user to complete a maze. The user's time is then recorded and inserted into a linked list of structures based on the time (from quickest time to longest). I wrote some code that does this, but I was wondering if I can make the code more concise/make sense -- like only using two pointers or having less if statements.Here is a struct that are the elements of the linked list (I also have a global variable to keep track of the head of the list:
Code:
//stores player's best time.
struct PlayerTime {
char name[MAX_STR_LEN];
float seconds;
struct PlayerTime* next;
[Code]....
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Apr 29, 2014
I am trying to sort a student database by age,but i am not sure whats wrong i think it has to deal with tmpstudent variable.
Code:
void insertion_sort(StudentDB *db) {
int i;
for (i = 0; i < db->num; ++i) {
int j = i - 1;
int val = db->records[i].age;
[Code] .....
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Feb 9, 2015
I am unable to insert data in a linked lists. Show function is not working.
insert
Code:
#include<stdio.h>
#include<stdlib.h>
typedef struct node{
int data;
struct node *next;
[Code] .....
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Apr 3, 2014
I want to use two dimensional array by insertion sort or quick sort
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Feb 18, 2013
I'm trying to create a function that allows insertion anywhere in a linked list...here is what I have so far but am a bit confused on where to go from here
Code:
void llAddAtIndex(LinkedList** ll, char* value, int index) {
LinkedList* newNode = (LinkedList*)malloc(sizeof(ll));
newNode = *ll;
LinkedList* prevNode = (LinkedList*)malloc(sizeof(ll));
[Code].....
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Jan 15, 2015
This program I'm working on accepts an array size from the user, prompts the user to store that many integers, sorts them from smallest to largest, and then searches for duplicates with a simple for loop. The ultimate goal of the assignment was to display duplicates in an array, and the rest of the functions are just how I decided to reach that goal.
Anyway, my program crashes if I choose an array size larger than 7. It sorts and displays duplicates perfectly with 7 or fewer arguments.
The exact moment it crashes is after I enter the final value it prompts me for, so it appears my inputsize() function and my inputarray() function are working, and the error may be in the arrsort() function. Code is below:
Code:
#include <stdio.h>
int funcinputsize(int);
void funcinputarray(int [], int size);
void funcarrsort(int [], int size);
void funcdupe(int [], int size);
[Code] ...
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