#include<iostream.h>
#include<conio.h>
#include<stdio.h>
#include<string.h>
#include<fstream.h>
#include<iomanip.h>
#include<ctype.h>
class date;
class sach;
class dausach;
class listdausach;
int ktmasach(dausach a, listdausach l);
class date
{
 int ngay;
 int thang;
 int nam;
public:
 date()
 {
  ngay=thang=nam=0;
 }
 friend istream &operator >> (istream &is, date &a)
 {
  do
  {
  cout<<"\n Ngay: ";
  is>>a.ngay;
  }while(a.ngay<1 || a.ngay>30);
  do
  {
  cout<<"\n Thang: ";
  is>>a.thang;
  }while(a.thang<1 || a.thang>12);
  do
  {
  cout<<"\n Nam: ";
  is>>a.nam;
  }while(a.nam<1990 || a.nam>2050);
  return is;
 }
 friend ostream &operator << (ostream &os, date a)
 {
  os<<a.ngay<<"/"<<a.thang<<"/"<<a.nam;
  return os;
 }
};
class sach
{
 char *tensach;
 char *tacgia;
 char *theloai;
 int namxb;
public:
 sach()
 {
  tensach=strdup("");
  tacgia=strdup("");
  theloai=strdup("");
  namxb=0;
 }
 ~sach()
 {
  delete []tensach;
  delete []tacgia;
  delete []theloai;
 }
 void nhap()
 {
  tensach=new char[20];
  tacgia=new char[20];
  theloai=new char[20];
  cout<<"\n Nhap ten sach: "; cin.getline(tensach, 20);cin.ignore();
  cout<<"\n Nhap tac gia: "; cin.getline(tacgia, 20);  cin.ignore();
  cout<<"\n The loai: "; cin.getline(theloai, 20);    cin.ignore();
  cout<<"\n Nam xuat ban: "; cin>>namxb;              cin.ignore();
 }
 void xuat()
 {
  cout<<"\n Ten sach: "<<tensach;
  cout<<"\n Tac gia: "<<tacgia;
  cout<<"\n The loai: "<<theloai;
  cout<<"\n Nam XB: "<<namxb;
 }
};
class dausach:public sach
{
 char *masach;
 int soluong;
 date ngaynhap;
public:
 dausach()
 {
  masach=strdup("");
  soluong=0;
 }
 ~dausach()
 {
  delete []masach;
 }
 char *getmasach()
 {
  return masach;
 }
 void nhap()
 {
  masach=new char[20];
  cout<<"\n Nhap ma sach: "; cin.getline(masach, 20);
  cin.ignore();
  sach::nhap();
  cout<<"\n So luong: "; cin>>soluong;
  cout<<"\n Ngay nhap: "; cin>>ngaynhap;
 }
 void xuat()
 {
  cout<<"\n Ma sach: "<<masach;
  sach::xuat();
  cout<<"\n So luong: "<<soluong;
  cout<<"\n Ngay nhap: "; cout<<ngaynhap;
 }
};
class listdausach
{
 int n;
 dausach *data;
 public:
 listdausach()
 {
  n=0;
  data=NULL;
 }
 ~listdausach()
 {
  delete []data;
 }
 void nhap()
 {
  dausach a;
  cout<<"\n So luong sach: "; cin>>n;
  //data=new dausach[n];
  for(int i=0; i<n; i++)
  {
  cout<<"\n Dau sach "<<i+1<<endl;
  lai:
  a.nhap();
  if(ktmasach(a, *this))
  {
    cout<<"\n Ma da ton tai !";
    goto lai;
  }
  else
    data[i]=a;
  }
 }
 void xuat()
 {
  for(int i=0; i<n; i++)
  {
  cout<<"\n Dau sach "<<i+1<<endl;
  data[i].xuat();
  }
 }
 int getn()
 {
  return n;
 }
 dausach getdausach(int i)
 {
  return data[i];
 }
} ;
int ktmasach(dausach a, listdausach l)
{
 for(int i=0; i<l.getn(); i++)
 {
  if(strcmp(a.getmasach(), l.getdausach(i).getmasach()))
  return 1;
 }
 return 0;
}
void main()
{
 listdausach l;
 l.nhap();
 l.xuat();
 getch();
}