# Is null node equal to leaf node?

No. A null node is a node pointer that holds the null value (zero). A leaf node is simply a node that has no children. Thus in a binary tree, a leaf node would hold two null nodes.

No. A leaf node is a node that has no child nodes. A null node is a node pointer that points to the null address (address zero). Since a leaf node has no children, its child nodes are null nodes.

### How to Count leaf nodes and non-leaf nodes in a Binary Tree?

#include <stdio.h> #include <stdlib.h> /* A binary tree node has data, pointer to left child and a pointer to right child */ struct node { int data; struct node* left; struct node* right; }; /* Function to get the count of leaf nodes in a binary tree*/ unsigned int getLeafCount(struct node* node) { if(node NULL && node->right==NULL) return 1; else return getLeafCount(node->left)+ getLeafCount(node->right); } /* Helper function that allocates a new node with the given…

### What is the algorithm to delete a child node in binary tree?

as far as i know u have 4 cases for the node u wanna delete 1.It's a leaf (has no children) 2.It has only left child 3.it has only right child 4.it has both children ,left and right now, let's work on it :> set a pointer node to the root while the element to be deleted doesnt equal the pointer if it's smaller, move the pointer to the left subtree if it's large…

### C program to create a binary search tree?

struct node{ int data; struct node *left, *right; }; typedef struct node node; non recursive method : main() { node * root = NULL , *new = NULL *temp1 =NULL , * temp2 = NULL; int num =1; printf(" Enter the elements of the tree( enter 0 to exit)\n"); while(1) { scanf("%d", &num); if(num==0) break; new = malloc(sizeof(node)); new->left = new->right = NULL; new->data = num; if( root NULL) root->left = new; else insert( new,root->left)…

### In linked lists there are no NULL links in?

There must be no NULL links in a linked list except in the tail node (because nothing comes after the tail). In doubly-linked lists, the head node also has a NULL link because nothing comes before the head. Every node in a list must be reachable from the previous (or next) node in the list, except the head node which is the only node we must keep track of. A NULL link would render all…

### What is the algorithm to find largest node in a binary search tree?

Since a binary search tree is ordered to start with, to find the largest node simply traverse the tree from the root, choosing only the right node (assuming right is greater and left is less) until you reach a node with no right node. You will then be at the largest node. for (node=root; node!= NULL&&node->right != NULL; node=node->right); This loop will do this. There is no body because all the work is done in…

### How do you implement queue using single list?

Queues are a first in first out structure (FIFO). This means all extractions occur at the head of the list and all insertions occur at the tail. This requires that you maintain pointers to the head and tail node to allow constant time insertion and extraction of nodes. The nodes themselves are singly linked, each pointing to the next node. The tail node always points to NULL until a new node is insert, which the…

### Write a program to insert and delete a node in binary tree?

node *SLSortWiseInsert(node *START, int data) { node *newnode; if(START NULL)) { printf("Inside this condition\n"); newnode = (node *)malloc(sizeof(node)); newnode->data = data; newnode->link = NULL; START->link = newnode; return START; } START->link = SLSortWiseInsert(START->link,data); return START; }

### What is a simple node?

In computer programming, a simple node is a structure that holds two pointers. The first pointer refers to the data that is indirectly associated with the node, while the other refers to the next node in the sequence. Simple nodes are typically used in forward lists (singly-linked lists) where we keep track of the head node only. The last node in the list refers to NULL as there can be no next node after the…

### Explain in detail in a binary tree of n nodes there are n plus 1 null pointers representing children?

In a binary tree of N nodes, if all of the nodes have one pointer set to null, then the tree is completely unbalanced, and has the characteristics and performance of a linked list. If you have N+1 null pointers, then the extra node is a special "head" node used to simplify processing of the tree. That "head" node will always have one pointer set to null.

### Write A program to add and multiply two very large numbers using doubly linked list?

#include<stdio.h> #include<stdlib.h> #include<string.h> #include<conio.h> struct node { int data ; node *next; node *prev ; } ; node* create_node(int x) { node *new1 ; new1=new node ; new1->data=x ; new1->next=NULL ; new1->prev=NULL; return(new1); } void insert(node *&list , int x) { node *new1; new1=create_node(x); node *temp ; temp=list ; if(list==NULL) list=new1; else { while(temp->next != NULL) temp=temp->next ; temp->next=new1; new1->prev=temp ; } } void insert_r(node *&list , int x) { node *new1; new1=create_node(x); if(list==NULL) list==new1…

### How do you delete a node with two children in binary tree using c?

Use a recursive function. void delete_node (node* n) { /* ensure the given pointer is valid */ if (n==NULL) return; /* recursively delete the left child */ delete_node (n->left); n->left = NULL; /* recursively delete the right child */ delete_node (n->right); n->right = NULL; /* delete the data (assuming the data is a pointer)*/ free (n->data); n->data = NULL; /* finally, delete the node itself */ free (n); n=NULL; }

### How to merge two single linked list using c?

Here is the java version, C should be similar // merges two Singly linked lists A and B, both sorted in increasing order of integers . // Return a Singly linked list sorted in increasing order // for ex if A = 1->2->3->6 and B = 2->4->7, returns 1->2->2->3->4->6->7 public LinkedList merge(LinkedList A, LinkedList B) { Node 1A = A.head; Node 1B = B.head; Node P1A = NULL; Node 2A = NULL; Node 2B =…

### How to find the mirror image of a binary tree?

Refer to http://cslibrary.stanford.edu/110/BinaryTrees.html void mirror(struct node* node) { if (node==NULL) { return; } else { struct node* temp; // do the subtrees mirror(node->left); mirror(node->right); // swap the pointers in this node temp = node->left; node->left = node->right; node->right = temp; } }

### Can you Write algorithm for circularly linked list?

C code. This has been tested. Example usage in main(). # include # include typedef struct node { int data; struct node *left; struct node *right; } NODE; NODE *alloc_node() { return calloc(sizeof(NODE), 1); } NODE *makelist(int data) { NODE *root = alloc_node(); root->data = data; root->left = root; root->right = root; return root; } /* Insert data *AFTER* the positionth node. */ NODE *add(NODE *position, int data) { NODE *new = alloc_node(); new->data =…

### Programs to implement operations on doubly linked list in C?

//Doubly linked list: #include<stdio.h> #include<conio.h> #include<alloc.h> # define NULL 0 typedef struct list { int data; struct list *next; struct list *prev; }node; node *head = NULL; node *prev = NULL; node* create_node() { node *new1; new1 = malloc(sizeof(node)); printf("\nEnter data:"); scanf("%d",&new1->data); new1->next = NULL; new1->prev = NULL; return(new1); } void insert_beg() { node *new1; if(head 1) insert_beg(); else insert_after(); break; case 3: search(); break; case 4: display(); break; case 5: printf("\nEnter the data to…

### Write a program in 'c' programming language to add two polynomials using linked list?

#include "stdio.h" #include "conio.h" struct barbie { int coff; int pow; struct barbie *link; }*ptr,*start1,*node,*start2,*start3,*ptr1,*ptr2; typedef struct barbie bar; int temp1,temp2; void main() { void create(void); void prnt(void); void suml(void); void sort(void); clrscr(); printf("Enrter the elements of the first poly :"); node = malloc(sizeof (bar)); start1=node; if (start1==NULL) { printf("Unable to create memory."); getch(); exit(); } create(); printf(" Enrter the elements of the second poly :"); node = malloc(sizeof (bar)); start2=node; if (start2==NULL) { printf("Unable…

### Write a C program to implement circular queue using linklist?

#include<iostream.h> class node { public: int data; node* link; }; class queue { node* front; node* back; public: queue() { front=NULL; back=NULL; } void enqueue(int d) { node* ptr; ptr=new node; ptr->data=d; ptr->link=NULL; if(front==NULL) { front=ptr; back=ptr; } else { back->link=ptr; back=back->link; } } void dequeue() { node* ptr; ptr=front; if(front==NULL) cout<<"\n Nothing can be deleted. \n"; else { ptr=front; front=front->link; delete ptr; ptr=NULL; cout<<"\n The first element has been deleted.\n"; Front(); } } void…

### Write a c program to implement the binary tree traversals?

struct NODE { struct NODE *left; int value; struct NODE *right; } create_tree( struct NODE *curr, struct NODE *new ) { if(new->value <= curr->value) { if(curr->left != NULL) create_tree(curr->left, new); else curr->left = new; } else { if(curr->right != NULL) create_tree(curr->right, new); else curr->right = new; } }

### A program that traverse a binary tree in preorder?

#include<stdio.h> #include<conio.h> struct node { int data; struct node *rlink; struct node *llink; }*tmp=NULL; typedef struct node NODE; NODE *create(); void preorder(NODE *); void inorder(NODE *); void postorder(NODE *); void insert(NODE *); void main() { int n,i,m; clrscr(); do { printf(“\n\n0.create\n\n1.insert \n\n2.preorder\n\n3.postorder\n\n4.inorder\n\n5.exit\n\n”); printf(“\n\nEnter ur choice”); scanf(“%d”,&m); switch(m) { case 0: tmp=create(); break; case 1: insert(tmp); break; case 2: printf(“\n\nDisplay tree in Preorder traversal\n\n”); preorder(tmp); break; case 3: printf(“\n\nDisplay Tree in Postorder\n\n”); postorder(tmp); break; case 4…

### How do you recursively reverse a singly linked list using c plus plus?

In this case recursion is not necessary, an iterative process is more efficient. Start by pointing at the head node. While this node has a next node, detach its next node and insert that node at the head. Repeat until the original head node has no next node. At that point the head has become the tail and all the nodes are completely reversed. The following example shows how this can be implemented, where the…

### C program to implement circular queue using doubly linked list?

#include<iostream.h> class node { public: int data; node* link; }; class queue { node* front; node* back; public: queue() { front=NULL; back=NULL; } void enqueue(int d) { node* ptr; ptr=new node; ptr->data=d; ptr->link=NULL; if(front==NULL) { front=ptr; back=ptr; } else { back->link=ptr; back=back->link; } } void dequeue() { node* ptr; ptr=front; if(front==NULL) cout<<"\n Nothing can be deleted. \n"; else { ptr=front; front=front->link; delete ptr; ptr=NULL; cout<<"\n The first element has been deleted.\n"; Front(); } } void…

### Write a program to insert or delete a node from doubly linked list?

#include<stdio.h> #include<conio.h> #include<malloc.h> #include<process.h> struct node { int num; struct node *next; struct node *prev; }; /* declaring a global node of type struct */ typedef struct node NODE; /* providing a type definition to the above created structure */ NODE *head=NULL; /* declaring some of the global variable that would be used throughout the program */ NODE *temp, *first, last; int info; void display(); void insert_at_end(); void insert_at_begin(); void insert_at_specifiedpos(); void main() /* starting…

### In linked list there are no NULL links in?

Linked-lists implemented with sentinel nodes have no NULL links. A sentinel node is simply a node that represents the tail of the list and has no data (and therefore provides no storage). Sentinels greatly simplify linked list implementations because we guarantee the existence of at least one node because the sentinel always exists even when the list is empty.