OOP Izdavacka Kuka

#include <iostream>
#include <cstring>

using namespace std;

class Book{
protected:
    char isbn_number[20];
    char title[50];
    char author[30];
    double price;
public:
    Book()
    {
        strcpy(this->isbn_number,"");
        strcpy(this->title,"");
        strcpy(this->author,"");
        this->price=0.0;
    }
    Book(char *isbn_number,char *title,char *author,double price)
    {
        strcpy(this->isbn_number,isbn_number);
        strcpy(this->title,title);
        strcpy(this->author,author);
        this->price=price;
    }
    Book(const Book &b)
    {
        strcpy(this->isbn_number,b.isbn_number);
        strcpy(this->title,b.title);
        strcpy(this->author,b.author);
        this->price=b.price;
    }
    virtual double bookPrice()=0;
    virtual int getType()=0;
    char *getISBN()
    {
        return isbn_number;
    }
    char *getTitle()
    {
        return title;
    }
    char *getAuthor()
    {
        return author;
    }
    const void setISBN(char *carce)
    {
       strcpy(this->isbn_number,carce);
    }
    virtual ~Book(){}
};
class OnlineBook:public Book{
private:
    char *url;
    int sizeMB;
public:
    OnlineBook()
    {
        this->url = new char[0];
        strcpy(url,"");
        this->sizeMB=0;
    }
    OnlineBook(char *isbn_number,char *title,char *author,double price
               ,char *url,int sizeMB):Book(isbn_number,title,author,price)
               {
                   this->url = new char[strlen(url)+1];
                   strcpy(this->url,url);
                   this->sizeMB=sizeMB;
               }
    double bookPrice()
    {
        if(sizeMB>20)
        {
            return this->price*1.2;
        }
        else return this->price;
    }
    int getType()
    {
        return 1;
    }

};
class PrintBook:public Book{
private:
    double weight;
    int stock;
public:
    PrintBook()
    {
        this->weight=0.0;
        this->stock=0;
    }
    PrintBook(char*isbn_number,char *title,char *author,double price
              ,double weight,int stock):Book(isbn_number,title,author,price)
              {
                  this->weight=weight;
                  this->stock=stock;
              }
     double bookPrice()
     {
         if(weight>0.7)
         {
             return this->price*1.15;
         }
         else return this->price;
     }
     int getType()
    {
        return 2;
    }


};
bool operator > (Book &b,Book &b1)
{
    if(b.bookPrice()>b1.bookPrice())
       {
           return true;
       }
    else return false;
}
  ostream &operator <<(ostream &out, Book &b)
    {
        return out<<b.getISBN()<<": "<<b.getTitle()<<", "<<b.getAuthor()<<" "<<b.bookPrice()<<endl;
    }
void mostExpensiveBook(Book **books,int n)
{
    double max=0.0;
    int iMax=0;
    int cBooks=0,eBooks=0;
    for(int i=0;i<n;i++)
    {
        if(books[i]->bookPrice()>max)
        {
            max=books[i]->bookPrice();
            iMax=i;
        }
        if(books[i]->getType()==1)
        {
            eBooks++;
        }
        if(books[i]->getType()==2)
        {
            cBooks++;
        }
    }
    cout<<"FINKI-Education"<<endl;
    cout<<"Total number of online books: "<<eBooks<<endl;
    cout<<"Total number of print books: "<<cBooks<<endl;
    cout<<"The most expensive book is: "<<endl;
    cout<<*books[iMax];

}
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;
}