.gcc

list.c

#include<stdio.h>
#include<stdlib.h>

struct item
{
 int v;
 struct item *next;
 struct item *prev;
};

void main()
{
 struct item *new=NULL, *curr=NULL, *tail=NULL;
 int i;

 curr = malloc(sizeof(struct item));
 (*curr).v = 1;
 (*curr).prev = NULL;
 (*curr).next = NULL;

 tail = curr;

 for(i=2;i<=10;i++)
 {
  new = malloc(sizeof(struct item));
  (*new).v = i;
  (*new).prev = curr;
  (*new).next = NULL;
  (*curr).next = new;
  curr = new;
 }

 (*curr).next = tail;
 (*tail).prev = curr;

 for(i=0;i<=100;i++)
 {
  printf("%d\n", (*curr).v);
  curr = (*curr).prev;
 }
}