Doubly linklist reverse

void reve()
{
    printf("\n The reverse");
    current=head;
    while(current!=0)
    {
        next_node=current->next;
        current->next=current->prev;
        current->prev= next_node;
        current=next_node;
    }
    current=head;
    head=tail;
    tail=current;

}
void redis()
{
    current=head;
    while(current!=0)
    {
        printf("[%d]\t[%d]\t[%d]\t",current,current->prev,current->data);
        current=current->next;
    }
}