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
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] ....
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.
View 1 Replies View RelatedI 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.
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?
I am not sure how to have to user input numbers into a tree and to have it print out the steps it takes to reach the goal
Header File
#include <iostream>
#include <stack>
using namespace std;
bool recursive_depth(int);
bool is_goal(int);
void input_tree();
void print_tree();
[Code] .....
Code:
#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
struct bst {
int val, level;
struct bst *left, *right, *parent;
[Code]....
The code above is supposed to be a binary search tree. The main outcome for this program is to display the tree in C each time the user inserts or deletes a value.
Since I am a newbie in C programming, I first tried creating a code that would simply display the values in the tree after a user inserts and deletes, before I proceed to displaying the exact tree.
But when I run it the following output shows:
And when I try to insert another value, It won't display anything and won't respond to any keys pressed.
What is the difference between BST and linked list? Or are BST implemented through linked list?
View 6 Replies View RelatedI'm new to program breadth first search and for my assignment we have to implement a breadth first search graph and output the order of the traversal. The problem is when I run my program I do not get any output from my traversal. All I get is "Breadth First Search Traversal starts at Vertex 2 and the order is: "
Here is my Queue class
//Declaration of node
struct node{
int info;
node *next;
};
//Defining Queue class
class Queue{
[Code] ....
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.
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] .....
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.
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 ?
How would I delete the largest node in a binary search tree recursively???
View 1 Replies View RelatedI'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?
For my data-structures class, I am attempting to create a binary search tree template to be used to create an AVL tree. I've written a Generic_Tree template for the BST to inherit from, and before I jump into implementing the AVL tree I'm testing the BST member functions. Everything was compiling fine until I added the BST insert() function. Now, I'm getting the following error message from my linker:
undefined reference to 'BST<void>::insert(int, void*)'
Stemming from the call in main line 16.
my makefile compiles with:
g++ -Wall -g Generic_Tree.cpp BST.cpp barfing.cpp main.cpp
Generic_Tree:
template < typename NODE_DATA, unsigned MAX_KIDS >
class Tree {
protected:
struct NODE {
NODE_DATA* contents;
Tree* child[MAX_KIDS];
Tree* parent;
[Code] ....
I'm use to c and havn't used classes or templates before (except for declaring instances of them). The whole syntax is mystifying to me,.
From HP / Microsoft (Visual Studio C++) <list>:
Code:
struct _Node
{ // list node
_Genptr _Next; // successor node, or first element if head
_Genptr _Prev; // predecessor node, or last element if head
_Ty _Myval; // the stored value, unused if head
};
The stored value is wasted space for the list head. Is there any advantage to implementing list using the same structure for a list head and node?
It has been a while since I built a binary tree from scratch so I decided to do it. Everything works fine but this one function. When I enter a number to search it just keeps running and allowing me to keep enter numbers.
Code:
void tree::search(int key,Node* leaf) {
if (leaf == NULL) {
std::cout<<"The tree is empty
[Code] ......
I am trying to implement BST using templates. This is the code that i have written.
Code: template <class T>
struct node
{
struct node *left;
[Code].....
There are no errors but the program hangs. What is the mistake with this program ?
I am not sure how to use the parameters ostream and enum type in a print function.
enum TraversalOrderType {preorder, inorder, postorder};
template <class ItemType>
void Tree<ItemType>::print(ostream & Outstream, TraversalOrderType order) {
[Code] ....
Is this the correct way to call the print function?
int main() {
Tree<int> tree1;
tree1.print(cout, preorder);
return 0;
}
I don't know why, but my remove function doesn't seem to operate properly. The rest of my code is fine, so I am trying to pinpoint the exact location of my error. The else if statement remove(root->left, data) should've been called twice, but it only called once.
BST* smallestNode(BST* root)
// precondition: T is not null
// postcondition: return the node in the subtree rooted at T that
[Code]....
Traversal of binary search tree. In my header file there is a function setTraversal (public) and private print file. As I understood from teacher's explanation, my setTraversal function should call the recursive print function and print the list depending on selected order (pre,in or post-order). I still cannot get my head around what should be in setTraversal function definition. All resources I read last two days explain each order separately (preorder, inorder, postorder). How can I combine them? Here is my code:
#include "NodeTypeBST.h"
#include <iostream>
enum TravType {PRE, IN, POST};
template<class T>
class BST
[Code] ....
I was working on binary tree implementation and came up with this implementation. optimize this code?
/*
Binary Search Tree(BST)
06/27/2013
*/
#include "iostream"
[Code].....
I'm working on a programming homework that asks us to implement all the functions of a Binary Search Tree using templated classes. I'm almost done with it but I'm sort of stuck with the last part which is the `search` function. For this part the homework asks for the following requirements
Quote
Node<T>* search(T value, Node<T>* subtree)
if the current node's value is the one we're search for, return a pointer to itif the current node's left and right subtree's are empty (both m_left and m_right are looking at nullptr) then return the nullptr to indicate we didn't find the valueif the value is less than the current node's value, return the search of the left subtreeif the value is greater than or equal to the current node's value, return the search of the right subtreeMake sure to only traverse a subtree if it's not null
I've just grasped the idea of a monte carlo tree search. Now I'm trying to implement it, but I'd like to clear up some questions I have. I am implementing this for the game of hex.
From what I understand after reading, the tree keeps track of previous moves played and traverses the tree until it reaches a node that is not in the tree. The node then gets added to the tree and a simulated game occurs. After reaching a terminal node, back propagation would update the value of every parent node until it reaches the root.
My question is why do we need to keep track of the nodes in the tree that are already played? How I'm thinking of doing this instead is to take the LAST MOVE made by the player and make that move the root. The tree would randomly select a spot on the board, and if the spot is EMPTY, then add the move to the tree. This would continue until a terminal node is reached which would return a value {-1,0,1} lose/draw/win.
Back propagation would update the value of the node until we reach a direct child of the root. Another move is randomly selected starting from the root (becoming the nth child of the root) and a game will be simulated again. If the random move is played already, then visit that node and play a random move again. In the unlikely case that all the random moves played matches the random moves played by a previous simulation, then nothing happens.
After say a thousand simulations has been run, the best node is picked based on certain heuristics such as win/loss ratio and most visited and so on. The move will be played and will never be again considered for the tree. After the player makes the next move, the same 1000 simulations run again with the scenario above.
Standard example. I have a large text file and I wish to lex it into words. I tell the program that all words are delimited by ' ' ';' ':' and ''.
When I run the program it seems to be outputting the occurances of the letters and not the words. Im gobsmacked, I dont know what the hell is going on. Heres the function that lexes letters and not words. I want words dammit words!!
First youll see I define root node and point it to null; This forms the base of the BST. Then keep munching one character at a time until EOF reached. If the character is not a delimiter, assign it to "word" string, character by character. If it is a delimiter, take the so-far-constructed "word" and chuck it in the BST, then clear the word string through .clear().
Repeat until done. But its not working.
Code:
struct masternode* lexical_scanner(ifstream* inputfile) {
string word;
char c;
struct masternode* root = NULL;
while (c!=EOF){
[Code] .....
All the other functions in the source file are just fine, I've tested them in other apps and they are purpose built.