Library Inheritance

Build a basic library system. Start with a base class LibraryItem that includes common attributes like title, author, and itemID. Then, create two derived classes, Book and DVD.

• The Book class should have an additional attribute pageCount and a method display_info() that prints all details of the book.
• The DVD class should have an additional attribute duration (in minutes) and a method display_info() that prints all details of the DVD.

Demonstrate the creation of a Book and a DVD object and display their information.

Answer

#include <iostream>

class LibraryItem {
public:
    std::string title;
    std::string author;
    int itemID;

    LibraryItem(std::string t, std::string a, int id) 
        : title(t), author(a), itemID(id) {}
};

class Book : public LibraryItem {
public:
    int pageCount;

    Book(std::string t, std::string a, int id, int pages) 
        : LibraryItem(t, a, id), pageCount(pages) {}

    void display_info() {
        std::cout << "Book Info:\n";
        std::cout << "Title: " << title << "\n";
        std::cout << "Author: " << author << "\n";
        std::cout << "Item ID: " << itemID << "\n";
        std::cout << "Page Count: " << pageCount << "\n";
    }
};

class DVD : public LibraryItem {
public:
    int duration;

    DVD(std::string t, std::string a, int id, int dur) 
        : LibraryItem(t, a, id), duration(dur) {}

    void display_info() {
        std::cout << "DVD Info:\n";
        std::cout << "Title: " << title << "\n";
        std::cout << "Author: " << author << "\n";
        std::cout << "Item ID: " << itemID << "\n";
        std::cout << "Duration: " << duration << " minutes\n";
    }
};

int main() {
    Book myBook("1984", "George Orwell", 123, 328);
    DVD myDVD("Inception", "Christopher Nolan", 456, 148);

    myBook.display_info();
    myDVD.display_info();

    return 0;
}