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Title create right-in threaded binary tree
Author meetali
Author Email sweetgal597 [at] yahoo.com
Description this program creates a right-in-threaded binary tree and
performs inorder taversal on it.

Category C » Beginners / Lab Assignments
Hits 376979
Code Select and Copy the Code
#include<stdio.h> #include<conio.h> #include<alloc.h> struct node { int info; struct node *right,*left; int rthread; }; typedef struct node *NPTR; NPTR getnode() { return (NPTR)malloc(sizeof(struct node)); } NPTR insertnode(NPTR root,NPTR p, NPTR rt) { if(root==NULL) { root=p; if(rt!=NULL) { root->right=rt; root->rthread=1; } } else if(p->info<root->info) root->left=insertnode(root->left,p,root); else if(root->rthread==1) { root->right=insertnode(NULL,p,rt); root->rthread=0; } else root->right=insertnode(root->right,p,rt); return root; } NPTR createthreadtree() { NPTR root=NULL,p; int temp; printf("pls enter elements, terminate by -99"); scanf("%d",&temp); while(temp!=-99) { p=getnode(); p->info=temp; p->left=p->right=NULL; p->rthread=0; root=insertnode(root,p,NULL); printf(" enter the next element"); scanf("%d",&temp); } return root; } void inorder(NPTR root) { NPTR p=root,q; do { while(p!=NULL) { q=p; p=p->left; } if(q!=NULL) { printf(" %d",q->info); p=q->right; while(q!=NULL&&q->rthread) { printf(" %d",p->info); q=p; p=p->right; } } }while(p!=NULL); } void main() { NPTR root; int ch,i; clrscr(); root=createthreadtree(); printf(" INORDER"); inorder(root); getch(); }

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