Vezbi__Zadaca1

#include <iostream>
#include <cstring>

char* copy_string(const char* source) {
   char* str = new char[strlen(source) + 1];
   strncpy(str, source, strlen(source));
   str[strlen(source)] = 0;
   return str;
}

using namespace std;

class Book {
protected:
   char ISBN[20];
   char naslov[50];
   char avtor[30];
   float cena;
public:
   Book(const char* ISBN = 0, const char* naslov = 0, const char* avtor = 0, const float cena = 0) {
      strcpy(this->ISBN, ISBN);
      strcpy(this->naslov, naslov);
      strcpy(this->avtor, avtor);
      this->cena = cena;
   }

   virtual float bookPrice() = 0;

   // setters
   void setISBN(char* isbn) { strcpy(ISBN, isbn); }

   friend bool operator>(Book& obj1, Book& obj2) {
      return obj1.bookPrice() > obj2.bookPrice();
   }

   friend ostream& operator<<(ostream& out, Book& obj) {
      out << obj.ISBN << ": " << obj.naslov << ", " << obj.avtor << " " << obj.bookPrice() << endl;
      return out;
   }

   virtual ~Book() {}
};

float Book::bookPrice() {
   return cena;
}

class OnlineBook : public Book {
private:
   char* url;
   int golemina;
public:
   OnlineBook(const char* ISBN, const char* naslov, const char* avtor, const float cena, const char* url = "", const int golemina = 0)
   : Book(ISBN, naslov, avtor, cena) {
      this->url = copy_string(url);
      this->golemina = golemina;
   }

   OnlineBook(OnlineBook& obj) : Book(obj.ISBN, obj.naslov, obj.avtor, obj.cena) {
      url = copy_string(obj.url);
      golemina = obj.golemina;
   }

   OnlineBook& operator=(OnlineBook& obj) {
      if(this != &obj) {
         strcpy(ISBN, obj.ISBN);
         strcpy(naslov, obj.naslov);
         strcpy(avtor, obj.avtor);
         cena = obj.cena;
         delete [] url;
         url = copy_string(obj.url);
         golemina = obj.golemina;
      }
      return *this;
   }

   float bookPrice() {
      if(golemina > 20)
         return Book::bookPrice() * 1.20;
      return Book::bookPrice();
   }

   ~OnlineBook() {
      delete [] url;
   }
};

class PrintBook : public Book {
private:
   float masa;
   bool inStock;
public:
   PrintBook(const char* ISBN, const char* naslov, const char* avtor, const float cena, const float masa = 0, const bool inStock = false)
   : Book(ISBN, naslov, avtor, cena) {
      this->masa = masa;
      this->inStock = inStock;
   }

   float bookPrice() {
      if(masa > 0.7)
         return Book::bookPrice() * 1.15;
      return Book::bookPrice();
   }

   ~PrintBook() {}
};

void mostExpensiveBook (Book** books, int n) {
   int vk_online = 0, vk_pecateni = 0;
   Book* mostExpensive = books[0];

   for(int i = 0; i < n; ++i) {
      if(i != 0)
         if(*books[i] > *mostExpensive)
            mostExpensive = books[i];

      OnlineBook* ob = dynamic_cast<OnlineBook*>(books[i]);
      PrintBook* pb = dynamic_cast<PrintBook*>(books[i]);

      if(ob != NULL) vk_online++;
      if(pb != NULL) vk_pecateni++;
   }

   cout << "FINKI-Education" << endl;
   cout << "Total number of online books: " << vk_online << endl;
   cout << "Total number of print books: " << vk_pecateni << endl;
   cout << "The most expensive book is: " << endl;
   cout << *mostExpensive;
}

int main(){

    char isbn[20], title[50], author[30], url[100];
    int size, tip;
    float price, weight;
    bool inStock;
    Book  **books;
    int n;

    int testCase;
    cin >> testCase;

    if (testCase == 1){
        cout << "====== Testing OnlineBook class ======" << endl;
        cin >> n;
        books = new Book *[n];

        for (int i = 0; i < n; i++){
            cin >> isbn;
            cin.get();
            cin.getline(title, 50);
            cin.getline(author, 30);
            cin >> price;
            cin >> url;
            cin >> size;
            cout << "CONSTRUCTOR" << endl;
            books[i] = new OnlineBook(isbn, title, author, price, url, size);
            cout << "OPERATOR <<" << endl;
            cout << *books[i];
        }
        cout << "OPERATOR >" << endl;
        cout << "Rezultat od sporedbata e: " << endl;
        if (*books[0] > *books[1])
            cout << *books[0];
        else
            cout << *books[1];
    }
    if (testCase == 2){
        cout << "====== Testing OnlineBook CONSTRUCTORS ======" << endl;
        cin >> isbn;
        cin.get();
        cin.getline(title, 50);
        cin.getline(author, 30);
        cin >> price;
        cin >> url;
        cin >> size;
        cout << "CONSTRUCTOR" << endl;
        OnlineBook ob1(isbn, title, author, price, url, size);
        cout << ob1 << endl;
        cout << "COPY CONSTRUCTOR" << endl;
        OnlineBook ob2(ob1);
        cin >> isbn;
        ob2.setISBN(isbn);
        cout << ob1 << endl;
        cout << ob2 << endl;
        cout << "OPERATOR =" << endl;
        ob1 = ob2;
        cin >> isbn;
        ob2.setISBN(isbn);
        cout << ob1 << endl;
        cout << ob2 << endl;
    }
    if (testCase == 3){
        cout << "====== Testing PrintBook class ======" << endl;
        cin >> n;
        books = new Book *[n];

        for (int i = 0; i < n; i++){
            cin >> isbn;
            cin.get();
            cin.getline(title, 50);
            cin.getline(author, 30);
            cin >> price;
            cin >> weight;
            cin >> inStock;
            cout << "CONSTRUCTOR" << endl;
            books[i] = new PrintBook(isbn, title, author, price, weight, inStock);
            cout << "OPERATOR <<" << endl;
            cout << *books[i];
        }
        cout << "OPERATOR >" << endl;
        cout << "Rezultat od sporedbata e: " << endl;
        if (*books[0] > *books[1])
            cout << *books[0];
        else
            cout << *books[1];
    }
    if (testCase == 4){
        cout << "====== Testing method mostExpensiveBook() ======" << endl;
        cin >> n;
        books = new Book *[n];

        for (int i = 0; i<n; i++){

            cin >> tip >> isbn;
            cin.get();
            cin.getline(title, 50);
            cin.getline(author, 30);
            cin >> price;
            if (tip == 1) {

                cin >> url;
                cin >> size;

                books[i] = new OnlineBook(isbn, title, author, price, url, size);

            }
            else {
                cin >> weight;
                cin >> inStock;

                books[i] = new PrintBook(isbn, title, author, price, weight, inStock);
            }
        }

        mostExpensiveBook(books, n);
    }

    for (int i = 0; i<n; i++) delete books[i];
        delete[] books;
    return 0;
}