Program : Doubly Linked List – Create

Program : Doubly Linked List – Create

// create and traverse doubly linked list

#include<stdio.h>

#include<conio.h>

#include<stdlib.h>

struct link

{

          int no;

          struct link *next;

          struct link *pre;

};

struct link *node,*start;

void create_link(struct link *node);

void display(struct link *node);

void main()

{

          clrscr();

          printf("\n creating doubly linked list");

          node=(struct link *)malloc(sizeof(struct link));

          create_link(node);

          printf("\n Output\n");

          display(node);

          getch();

}

void create_link(struct link *node)

{

          char ans;

          start->next=NULL;

          start->pre=NULL;

          node=start;

          fflush(stdin);

          printf("\n Enter 'n' for break:-");

          ans=getchar();

          while(ans!='n')

          {

                   node->next=(struct link *)malloc(sizeof(struct link));

                   node->next->pre=node;

                   node=node->next;

                   printf("\n Enter data for node:-");

                   scanf("%d",&node->no);

                   node->next=NULL;

                   fflush(stdin);

                   printf("\n Enter 'n' for break:-");

                   ans=getchar();

          }

}

void display(struct link *node)

{

          node=start->next;

          do

          {

                   printf("\n  %d",node->no);

                   node=node->next;

          }while(node->next);

          printf("\n Backward direction");

          do

          {

                   printf("\n  %d",node->no);

                   node=node->pre;

          }while(node);

}

Posted By : Ruchita Pandya