C/C++ :: Binary Tree - Count How Often Character (e) Appears In It

C++ :: Count How Many Times Each Word Appears - Empty Output Array File

Sep 20, 2014

I am writing this program that is supposed to read a file, put the data into an array, alphabetize, count how many times each word appears and print to an output function. I posted before on how my program had an error when I ran it but I have fixed that. Now my outputArray file is empty. It gets created but there's nothing in it.

#include <iostream>
#include <fstream>
#include <sstream>
#include <string>

using namespace std;
//global to this file

[Code] .....

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C :: Number 1 Appears In Next Line Every Time On Typing A Character

May 17, 2014

Everytime I type a character, the number 1 appears in the next line. And i just keep getting the message "Wrong! I have more than that." even when I type a number bigger than 1023

Code:

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
int main(void) {
srand(time(NULL));

[Code] ....

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C++ :: Search For A Number When Vector Is In Order - Count How Many Times That Number Appears

Feb 6, 2014

In this program what i'm doing is to search for a number when the vector is in order, and count how many times that number appears, the problem is that count how many times the number does not appear, but when its appear the program stays in an "standby mode" and the cursor does not move.

int buscarNumOrdenado (int x [MAX]) //MAX is the define {
int num,d, LimiteInferior, LimiteSuperior,mitad;
d=0;
LimiteInferior = 0;
LimiteSuperior = MAX-1;

[Code] ....

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C/C++ :: Find Maximum Element From A Tree (not A Binary Tree)

Oct 31, 2014

I want to find maximum element from a tree (not a binary tree ) ???? ...using c language...

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C++ :: How To Count Character Occurrence In Array

Jan 17, 2015

i have a problem i cant find a way to count how many times a character occur in a character array the out put should be

a=2
b=1

but my output is

a=2
b=1
a=0

i cant find away to get rid of the other a letter i dont know what to do

#include <iostream>
using namespace std;
int main() {
char array[3] = {'a','b','a'};
char frequency[26] ={'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'};

[Code]...

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C++ :: Create Binary Search Tree Template To Be Used To Create AVL Tree

Feb 10, 2013

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,.

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C++ :: Program That Count Occurrence Of Character In Text File And Produce Histogram

Nov 18, 2014

Here is what i have so far:

#include<fstream>
#include<iostream>
#include<string>

[Code].....

I also need to do a loop that scan the count array and check if the element is bigger than the previous one.

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C/C++ :: Delete From Sentence All Words With Character Count Which Is Equal To Pair Number

Nov 20, 2014

I have an assigment to make program which deletes from sentence all words with character count which is equal to pair number , for example - [ I like C ] and the result of this program should be [I C] because the word like contains 4 characters which is pair and it should be removed.

So I started writing my program and I am stuck at this block of code -

#include <stdio.h>
#include <stdlib.h>
main () {
char text[100], blank[100];
int c=0,d=0,i,j;
gets(text);

[Code] ....

To explain what is happening - I go through all string and search for first ' ' space symbol and check its value. If it is pair then my program prints that it is not pair[because last character before space had not pair number of characters], but the hardest part comes in when i have two not pair words , because space takes one character and now when i check if i%2 == 1 the answer is false [0] for the second word .

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C++ :: Printing A Binary Tree?

Feb 1, 2014

It 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);
}
}

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C++ :: Search Binary Tree

Aug 12, 2014

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] ......

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C :: Function Max In Binary Tree

May 28, 2013

I 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]...

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C++ :: Binary Tree Source?

Jul 12, 2013

I just want to ask if some of you know good source for learning about Binary Trees.

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C/C++ :: Searching A Binary Tree?

Mar 1, 2015

I'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].....

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C/C++ :: How To Print Binary Tree

Jan 14, 2015

I 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]...

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C++ :: How To Build Binary Tree With Values

Dec 29, 2013

I 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] .....

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C++ :: Copy Control Of Binary Tree

May 17, 2013

I 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] ......

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C++ :: Binary Search Tree With Templates?

Oct 27, 2014

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 ?

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C :: Find Sum Of Depths In Binary Tree

Jun 18, 2013

I 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?

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C :: Binary Tree Insert Function

Mar 31, 2014

I 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].....

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C :: Deleting Binary Tree Node?

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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C++ :: Height Or Depth Of Binary Tree

Feb 23, 2014

I'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

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C++ :: How To Insert Item Into Binary Tree

Jun 30, 2013

I 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`?

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C++ :: Reading TXT File Into Binary Tree

May 30, 2013

How 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?

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C++ :: Storing 234 Tree In Binary File

Mar 20, 2014

How 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++ :: How To Implement binary Tree Using A Class

Aug 23, 2013

I'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?

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