C++ :: Storing 234 Tree In Binary File
Mar 20, 2014How would I store a 234 tree in a binary file?
I've never worked with trees or binary files before so it is very confusing.
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C++ :: Reading TXT File Into Binary Tree
May 30, 2013How to store values from a .txt file delimited with semicolons (;) into a class which is then stored into a Binary Search Tree. After browsing Google for a few hours, and trying various examples of people using Vectors, I just can't seem to get my program to work using Object Oriented Programming with an instance of the class Person.
My two classes are Person, and BinarySearchTree as follows:
class Person{
private:
string first_surname;
string second_surname;
string name;
int ID;
[Code] ....
Ok so my text file saves the data of each person in the same order as the class with each value separated by a semicolon.
i.e. First_Surname;Second_Surname;Name;ID;Telephone;Score;
void fillTree( BinarySearchTree *b) {
string input[7];
Person p;
fstream file("scores.txt", ios::in); // reads text file
if(file.is_open()) {
[Code] ....
I understand that I get an error because a vector is saved as integers, and I am using strings, my question is, any other way to read the .txt file and save each data separated by a semicolon, into the Person class?
C++ :: Lexing File Into Binary Search Tree
May 22, 2013Standard 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.
C++ :: Pointer File Of Class In Binary Tree
Jun 16, 2013#include<fstream.h>
#include<conio.h>
#include<string.h>
#include<stdio.h>
#include<stdlib.h>
class Student {
private: int ID,Hour; char Name[20],Sex[7]; float Rate,Salary,Amount;
[Code] ......
C :: Write / Read Tree Nodes Into A Binary File
Oct 20, 2013I have a binary tree, and I want to store all information its leaves stores into a binary file and then read it.
What I tried:
A function that reads the tree, and whenever it finds a leaf, it writes in the binary file:
Code:
[...]
if(tree->right == NULL && tree->left == NULL){
fwrite(tree, sizeof(tree), 1, output);
}
[...] a
And in the main function:
Code:
[...]
for(i=0;i<5;i++){
fread(tree, sizeof(tree), 1, output);
printf("This is the leaf number %d", tree->num);
}
[...]
I'm trying to read 5 nodes just to see if its working but it isn't. The output shows the first node of the tree everytime.
C++ :: Read And Write Binary Tree To File - Deserialization
Jun 24, 2013So as a learning exercise, I am trying to read and write a binary tree to a file. After googling around, I decided to use a preorder traversal (including null nodes) to write the binary tree to the file. I got stuck trying to read a tree from a file. I can't figure out how to create an unknown number of nodes when they are needed. I could use an array, but that just seems bulky - plus it could run out of space. Is that what I have to do? I've heard of vectors before, but not very much.
View 5 Replies View RelatedC/C++ :: Find Maximum Element From A Tree (not A Binary Tree)
Oct 31, 2014I want to find maximum element from a tree (not a binary tree ) ???? ...using c language...
View 1 Replies View RelatedC++ :: Create Binary Search Tree Template To Be Used To Create AVL Tree
Feb 10, 2013For 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,.
C++ :: Storing A Class With String Members Into Binary Files
Nov 17, 2014Im trying to make a c++ program for a school project, and i need to store the information into binary files, but I'm having some problems trying to store a class with string members, for example:
class whatever{
protected:
string name;
public:
(List of functions)
}
But if I do that, my code just dont work when I write and read a binary file, but if I change the string to char array, for example:
class whatever{
protected:
char name[20];
public:
(List of functions)
}
It works good, so I wanted to know if there's some way to store a class wiht strings in binary files, or what am I doing wrong?
C++ :: Printing A Binary Tree?
Feb 1, 2014It only prints out the root in an infinite loop.
Code: void Btree::printTree(Node* tree)
{
tree=root;
if (tree != NULL)
{
std::cout<<" "<< tree->key;
printTree(tree->left);
printTree(tree->right);
}
}
C++ :: Search Binary Tree
Aug 12, 2014It 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] ......
C :: Function Max In Binary Tree
May 28, 2013I have a problem with the C code . I created two functions, one that runs through the tree inorder, the other that returns the maximum value in the tree. The problem is when I use in the main the method "max", which goes in a loop and not print anything on the screen . If I remove the call to method "max" it works fine. Here's the code:
Code:
#include<stdio.h>
#include<stdlib.h>
#define bool int
/* A binary tree tNode has data, pointer to left child
and a pointer to right child */
struct tNode {
[Code]...
C++ :: Binary Tree Source?
Jul 12, 2013I just want to ask if some of you know good source for learning about Binary Trees.
View 2 Replies View RelatedC/C++ :: Searching A Binary Tree?
Mar 1, 2015I've almost got my code working. My issue is, if I type in either one of the first two id numbers, it finds the person and displays as it's supposed to, however if I type any of the last 6 id numbers it says id not found. I've been staring at this forever and can't see what I'm missing />/> ps, I haven't added in all my comments yet Binary tree template
//Binray tree template class
#ifndef BINARYTREE_H
#define BINARYTREE_H
[Code].....
C/C++ :: How To Print Binary Tree
Jan 14, 2015I want to print binary tree in this form on screen
1
/
2 3
/ /
4 5 6 7
/ /
8 9 10 11
This is the code for creating Binary Tree:
#include<stdio.h>
struct node
{
int data;
struct node *right;
struct node *left;
};
struct node *root = NULL;
int main ()
{
struct node *child, *temp;
[Code]...
C++ :: How To Build Binary Tree With Values
Dec 29, 2013I am not sure how to build the tree with values:
Code:
struct Node *root = 1 root->left = 2
root->right = 3
root->left->left = 4;
root->left->right = 5;
Everything should be right except the main(). How to demonstrate this program correctly?
Code:
#include <iostream>
#include<stdio.h>
#include<stdlib.h>
#include <stack> // std::stack
[Code] .....
C++ :: Copy Control Of Binary Tree
May 17, 2013I have implemented a copy control version of binary tree.. As I am a Beginner. I think i have made my mistake.
Code:
#include <iostream>
#include <string>
class TreeNode{
TreeNode(const std::string &val):value(val),count(new int(1)){}
TreeNode(const TreeNode& rhs):value(rhs.value),count(count),left(rhs.left),right(rhs.right){++*count; }
[Code] ......
C++ :: Binary Search Tree With Templates?
Oct 27, 2014I 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 ?
C :: Find Sum Of Depths In Binary Tree
Jun 18, 2013I need to write a program to find the sum of depths of a binary tree, where a depth is by definition the shortest distance between a node and the root. I am required to code this using recursion.
I was thinking of first coding a helper recursion to find the depth for each node. What would be the best way to do that? If I could move from the node to the root, I believe programming this helper recursion would not be very difficult. Is there a way to progress from the node to the root?
C :: Binary Tree Insert Function
Mar 31, 2014I am having trouble writing an insert function for a binary tree.
Here is the structure that I have to use.
I have the print function done, the insert function is the one I am having trouble with,
Code:
typedef struct bt_{
int value;
struct bt_ *right;
struct bt_ *left;
}BST;
[Code].....
C :: Deleting Binary Tree Node?
Feb 18, 2014I 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.
C++ :: Height Or Depth Of Binary Tree
Feb 23, 2014I'm in interested to know what will be the height of binary tree with say 5 nodes (consider it balanced) is it 2 or 3?
9
/
5 13
/
3 7
and for following tree also:
2
/
7 5
/
2 6 9
/ /
5 11 4
is it 3 or 4?
i'm asking because, not able to find correct/one answer.
the algorithm i find is:
depth(struct tree*t) {
if ( t == NULL) return 0;
return max( depth(tree->left), depth(tree->right) ) + 1;
}
According to it, ans for second will be 4
But as per image on wikipedia [URL] .... the ans is 3
C++ :: How To Insert Item Into Binary Tree
Jun 30, 2013I am trying to write a function that inserts an item into this binary tree in C++.
template <typename T>
struct BTree {
T val;
BTree<T>* left;
BTree<T>* right;
BTree(T v, BTree<T>* l=nullptr, BTree<T>* r=nullptr) :
val(v), left(l), right(r) {}
};
Here's my attempt.
template <typename T>
void insert(BTree<T>* tree, T item) {
if (tree == nullptr) {
tree = new BTree<T>(item);
} else if (item < tree->val) {
insert(tree->left, item);
} else {
insert(tree->right, item);
} }
I think this function may not be working because I am modifying `tree`, which is a local variable. How do I actually modify the current pointer that `tree` represents, not just `nullptr`?
C++ :: How To Implement binary Tree Using A Class
Aug 23, 2013I'm trying to implement a binary tree using this class:
class btree {
public:
int key;
btree *left;
btree *right;
btree(){left=NULL; right=NULL;}
void insert(int key);
[Code] ....
gives me the following error:
albero_binario1.cpp: In member function ‘void btree::insert(int)’:
albero_binario1.cpp:34:18: error: lvalue required as left operand of assignment
albero_binario1.cpp:39:15: error: request for member ‘insert’ in ‘((btree*)this)->btree::right’, which is of non-class type ‘btree*’
albero_binario1.cpp:41:14: error: request for member ‘insert’ in ‘((btree*)this)->btree::left’, which is of non-class type ‘btree*’
what can i do?
C++ :: Binary Search Tree Printing
Apr 19, 2014I 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;
}
C++ :: Binary Search Tree Remove?
May 10, 2014I 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]....