Search Node in Binary Tree without recursion
Write a C Program to Search Node in binary search tree without recursion. Here’s simple Program to Search Node in binary search tree without recursion in C Programming Language.
What is Tree ?
In linear data structure, data is organized in sequential order and in non-linear data structure, data is organized in random order. Tree is a very popular data structure used in wide range of applications.
A tree data structure can be defined as follows…
- Tree is a non-linear data structure which organizes data in hierarchical structure and this is a recursive definition.
A tree data structure can also be defined as follows…
- Tree data structure is a collection of data (Node) which is organized in hierarchical structure and this is a recursive definition.
Every individual element is called as Node. Node in a tree data structure, stores the actual data of that particular element and link to next element in hierarchical structure.
Below is the source code for C Program to Search Node in binary search tree without recursion which is successfully compiled and run on Windows System to produce desired output as shown below :
SOURCE CODE : :
/* C Program to Search Node in binary search tree without recursion */ #include<stdio.h> #include<stdlib.h> #define MAX 50 struct node { struct node *lchild; int info; struct node *rchild; }; struct node *search_nrec(struct node *root, int skey); struct node *insert_nrec(struct node *root, int ikey ); void display(struct node *ptr,int level); int main( ) { struct node *root=NULL, *ptr; int choice,k; while(1) { printf("\n"); printf("1.Search\n"); printf("2.Insert\n"); printf("3.Display\n"); printf("4.Quit\n"); printf("\nEnter your choice : "); scanf("%d",&choice); switch(choice) { case 1: printf("\nEnter the key to be searched : "); scanf("%d",&k); ptr = search_nrec(root, k); if(ptr==NULL) printf("\nKey not present\n"); else printf("\nKey present\n"); break; case 2: printf("\nEnter the key to be inserted : "); scanf("%d",&k); root = insert_nrec(root, k); break; case 3: printf("\n"); display(root,0); printf("\n"); break; case 4: exit(1); default: printf("\nWrong choice\n"); }/*End of switch*/ }/*End of while */ return 0; }/*End of main( )*/ struct node *search_nrec(struct node *ptr, int skey) { while(ptr!=NULL) { if(skey < ptr->info) ptr = ptr->lchild; /*Move to left child*/ else if(skey > ptr->info) ptr = ptr->rchild; /*Move to right child */ else /*skey found*/ return ptr; } return NULL; }/*End of search_nrec()*/ struct node *insert_nrec(struct node *root, int ikey) { struct node *tmp,*par,*ptr; ptr = root; par = NULL; while( ptr!=NULL) { par = ptr; if(ikey < ptr->info) ptr = ptr->lchild; else if( ikey > ptr->info ) ptr = ptr->rchild; else { printf("Duplicate key"); return root; } } tmp=(struct node *)malloc(sizeof(struct node)); tmp->info=ikey; tmp->lchild=NULL; tmp->rchild=NULL; if(par==NULL) root=tmp; else if( ikey < par->info ) par->lchild=tmp; else par->rchild=tmp; return root; }/*End of insert_nrec( )*/ void display(struct node *ptr,int level) { int i; if(ptr == NULL )/*Base Case*/ return; else { display(ptr->rchild, level+1); printf("\n"); for (i=0; i<level; i++) printf(" "); printf("%d", ptr->info); display(ptr->lchild, level+1); } }/*End of display()*/
OUTPUT : :
/* C Program to Search Node in binary search tree without recursion */ 1.Search 2.Insert 3.Display 4.Quit Enter your choice : 2 Enter the key to be inserted : 5 1.Search 2.Insert 3.Display 4.Quit Enter your choice : 2 Enter the key to be inserted : 3 1.Search 2.Insert 3.Display 4.Quit Enter your choice : 2 Enter the key to be inserted : 4 1.Search 2.Insert 3.Display 4.Quit Enter your choice : 2 Enter the key to be inserted : 2 1.Search 2.Insert 3.Display 4.Quit Enter your choice : 2 Enter the key to be inserted : 7 1.Search 2.Insert 3.Display 4.Quit Enter your choice : 2 Enter the key to be inserted : 6 1.Search 2.Insert 3.Display 4.Quit Enter your choice : 2 Enter the key to be inserted : 8 1.Search 2.Insert 3.Display 4.Quit Enter your choice : 3 8 7 6 5 4 3 2 1.Search 2.Insert 3.Display 4.Quit Enter your choice : 1 Enter the key to be searched : 9 Key not present 1.Search 2.Insert 3.Display 4.Quit Enter your choice : 1 Enter the key to be searched : 3 Key present 1.Search 2.Insert 3.Display 4.Quit Enter your choice : 4 Process returned 1
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