apc.h

#ifndef APC_H
#define APC_H
#define SUCCESS 0
#define FAILURE -1

typedef int data_t;
typedef struct node
{
	struct node *prev;
	data_t data;
	struct node *next;
}Dlist;


/* Include the prototypes here */
int addition(Dlist **head1, Dlist **tail1, Dlist **head2, Dlist **tail2, Dlist **headR, Dlist **tailR);

int subtraction(Dlist **head1, Dlist **tail1, Dlist **head2, Dlist **tail2, Dlist **headR,Dlist **tailR);

int multiplication(Dlist **head1, Dlist **tail1, Dlist **head2, Dlist **tail2, Dlist **headR, Dlist **tailR,Dlist **headR2,Dlist **tailR2,char *argv[]);

int division(Dlist **head1, Dlist **tail1, Dlist **head2, Dlist **tail2, Dlist **headR,Dlist **tailR, char *argv[]);

int dl_insert_first(Dlist **head, Dlist **tail, int data);

int dl_delete_first(Dlist **head, Dlist **tail);

int dl_delete_list(Dlist **head, Dlist **tail);

void print_list(Dlist *head);

#endif