#include <iostream>
#include <string>

using namespace std;

struct Library {
    string book_name;
    string author_name;
    string author_lastname;
    string genre;
    int year;
    int price;
    int id;
};

bool true_cond(Library &lib) {
    return true;
}

bool genre_cond(Library &lib) {
    return lib.genre == "roman";
}

bool price_cond(Library &lib) {
    return lib.price < 300;
}

char* get_book_name(Library &lib) {
    return (char *) lib.book_name.c_str();
}

char* get_author_lastname(Library &lib) {
    return (char *) lib.author_lastname.c_str();
}

void print(int count, string title, Library *lib,
           bool (*condition)(Library &lib), char* (*get)(Library &lib)) {
    cout << title << endl;
    for (int i = 0; i < count; i++) {
        if (condition(lib[i])) {
            cout << get(lib[i]) << endl;
        }
    }
}

int main() {

    int const COUNT = 5;
    Library *lib = new Library[COUNT];

    for (int i = 0; i < COUNT; i++) {
        cout << "Zadej nazev knihy, prijmeni autora, jmeno autora, zanr knihy, rok vydani, cenu a id:" << endl;
        cin >> lib[i].book_name;
        cin >> lib[i].author_lastname;
        cin >> lib[i].author_name;
        cin >> lib[i].genre;
        cin >> lib[i].year;
        cin >> lib[i].price;
        cin >> lib[i].id;
    }

    print(COUNT, "Romany jsou:", lib, genre_cond, get_book_name);
    cout << endl;

    print(COUNT, "Knihy s cenou mensi nez 300,- Kc jsou:", lib, price_cond, get_book_name);
    cout << endl;

    print(COUNT, "Prijmeni vsech autoru jsou:", lib, true_cond, get_author_lastname);

    return 0;
}