DLL.H

#include <iostream>
#define first(L) L.first
#define next(P) P->next
#define prev(P) P->prev
#define info(P) P->info
#define judul(P) P->judul
using namespace std;

typedef int infotype;
typedef struct elmList *address;

struct elmList{
    infotype info;
    string judul;
    address next;
    address prev;
};

struct List{
    address first;
    address last;
};

address getSongAddress(string judul,List L);
bool isEmpty(List L);
void createList(List &L);
void createNewElement(infotype X,address &P);
void createNewSong(infotype ID,string X,address &P);
void insertFirst(List &L, address P);
void inserAfter(List &L, address &Target,address P);
void insertLast(List &L, address P);
void deleteFirst(List &L, address &P);
void deleteAfter(List &L, address &Target,address &P);
void deleteLast(List &L, address &P);
void concat(List L1, List L2, List &L3);
void removeLagu(string judul,List &L);
void printInfo(List L);