Mar 14, 2012

C program to count the leaves of the binary tree.

Write a C program to count the leaves of the binary tree.
Binary tree is the ordered directed tree data structure, in which each node has at most two nodes.
A node is called as a leaf node,  if it does not contains any child elements. In this program, We used the structures to create the binary tree.
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#include <stdio.h>
#include <stdlib.h>
#include <conio.h>

struct node
 int data;
 struct node* leftnode;
 struct node* rightnode;

//get the leaves count
unsigned int getLeafCount(struct node* node)
 if(node == NULL)
  return 0;
 if(node->leftnode == NULL && node->rightnode==NULL)
  return 1;
  return getLeafCount(node->leftnode)+

struct node* newNode(int data)
 struct node* node = (struct node*)
  malloc(sizeof(struct node));
 node->data = data;
 node->leftnode = NULL;
 node->rightnode = NULL;


int main()

 struct node *root = newNode(1);
 root->leftnode = newNode(2);
 root->rightnode = newNode(3);
 root->leftnode->leftnode = newNode(4);
 root->leftnode->rightnode = newNode(5); 

 printf("\n\nLeaf count of the binary tree is %d", getLeafCount(root));

 return 0;

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