P6/list3802.cpp at master · leonardodiasc/P6 · GitHub

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#include <iostream>
#include <string>

using namespace std;

class work
{
public:
    work() = default;
    work(work const&) = default;
    work(string const& id, string const& title): id_{id}, title_{title} {}
    virtual ~work() {};

    string const& id() const { return id_; }
    string const& title() const { return title_; }
    virtual void print(ostream&) const {}

private:
    string id_;
    string title_;
};

class book : public work{
    public:
    book(): work{}, author_{}, pubyear_{0} {}
    book(string const& id, string const& title, string const& author, int pubyear)
    : work{id, title}, author_{author}, pubyear_{pubyear} {}

    string const& author() const { return author_; }
    int const& pubyear() const { return pubyear_; }
    void print(ostream& out) const override{
        out << author() << ", " << title() << ", " << pubyear() << ".";
    }
    private:
    string author_;
    int pubyear_;
};

class periodical: public work{
    public:
    periodical() : work{}, volume_{0}, number_{0}, date_{} {}
    periodical(string const& id, string const& title, int volume, int number, string const& date)
    : work{id, title}, volume_{volume}, number_{number}, date_{date} {}
    int volume() const { return volume_; }
    int number() const { return number_; }
    string const& date() const { return date_; }
    void print(ostream& out) const override {
        out << title() << ", " << volume() << "( " << number() << "), " << date() << ".";
    }
    private:
    int volume_;
    int number_;
    string date_;
    };


void showoff (work const& w) {
    w.print(std::cout);
    std::cout << '\n';
}

int main () {
    book sc{"1", "The Sun Also Crashes", "Ernest Lemmingway", 2000};
    book ecpp{"2", "Exploring C++", "Ray Lischner", 2013};
    periodical pop{"3", "Popular C++", 13, 42, "January 1, 2000"};
    periodical today{"4", "C++ Today", 1, 1, "January 13, 1984"};
    showoff(sc);
    showoff(ecpp);
    showoff(pop);
    showoff(today);

}