#include "stdio.h"
typedef char datatype;
typedef struct dlistnode{
      datatype data;
      struct dlistnode *prior,*next;
}dlistnode;
typedef dlistnode * dlinklist;
dlinklist head;
void Delete(dlistnode *p,dlinklist L)
{
		if((p!=NULL)&&(p!=L)){
			p->prior->next=p->next;
    		p->next->prior=p->prior;
    		free(p);
		}
		else
			printf("Deletion of head node not permitted.\n");
}	

void main()
{
	dlinklist L;
	Delete(head,L);
}