Main.cpp

#include <iostream>
#include <fstream>
#include <vector>

using namespace std;

class Book
{
private:
    int id;
    string title;
    string author;
    int number;

public:
    Book(int id, string title, string author, int number)
    {
        this->id = id;
        this->title = title;
        this->author = author;
        this->number = number;
    }

    int getID()
    {
        return id;
    }

    string getTitle()
    {
        return title;
    }

    string getAuthor()
    {
        return author;
    }

    int getNumber()
    {
        return number;
    }
};

class Member
{
private:
    string username;
    string password;
    string name;
    string phone;

public:
    Member(string uname, string pass, string name, string phone)
    {
        username = uname;
        password = pass;
        this->name = name;
        this->phone = phone;
    }

    string getUsername()
    {
        return username;
    }

    string getPassword()
    {
        return password;
    }

    string getName()
    {
        return name;
    }

    string getPhone()
    {
        return phone;
    }

    void login(vector<Book> &books)
    {
        // TODO
    }
};

class Admin
{
private:
    string username;
    string password;
    string name;

public:
    Admin(string uname, string pwd, string n)
    {
        username = uname;
        password = pwd;
        name = n;
    }

    string getUsername()
    {
        return username;
    }

    string getPassword()
    {
        return password;
    }

    string getName()
    {
        return name;
    }

    void login(vector<Book> books, vector<Member> members)
    {
        // TODO
    }
};

class Library
{
private:
    vector<Book> books;
    vector<Member> members;
    vector<Admin> admins;

public:
    Library()
    {
        fstream booksfile("books.txt");
        fstream adminsfile("admins.txt");
        fstream membersfile("members.txt");
        if (booksfile.is_open())
        {
            int id;
            string title;
            string author;
            int number;
            while (booksfile >> id >> title >> author >> number)
            {
                Book book(id, title, author, number);
                books.push_back(book);
            }
            booksfile.close();
        }
        if (adminsfile.is_open())
        {
            string username;
            string password;
            string name;
            while (adminsfile >> username >> password >> name)
            {
                Admin admin(username, password, name);
                admins.push_back(admin);
            }
            adminsfile.close();
        }
        if (membersfile.is_open())
        {
            string username;
            string password;
            string name;
            string phone;

            while (membersfile >> username >> password >> name >> phone)
            {
                Member member(username, password, name, phone);
                members.push_back(member);
            }
            membersfile.close();
        }
    }

    void run()
    {
        while (true)
        {
            int choice;
            string username, password;
            cout << "1. Member" << endl;
            cout << "2. Admin" << endl;
            cin >> choice;
            cout << "Username: ";
            cin >> username;
            cout << "Password: ";
            cin >> password;

            if (choice == 1)
            {
                bool success = false;
                for (auto &member : members)
                {
                    if (member.getUsername() == username && member.getPassword() == password)
                    {
                        member.login(books);
                        success = true;
                    }
                }
                if (!success)
                {
                    cout << "Invalid username or password, please try again..." << endl;
                }
            }
            else if (choice == 2)
            {
                bool success = false;
                for (auto &admin : admins)
                {
                    if (admin.getUsername() == username && admin.getPassword() == password)
                    {
                        admin.login(books, members);
                        success = true;
                    }
                }
                if (!success)
                {
                    cout << "Invalid username or password, please try again..." << endl;
                }
            }
        }
    }

    ~Library()
    {
        fstream booksfile("books.txt");
        fstream adminsfile("admins.txt");
        fstream membersfile("members.txt");
        if (booksfile.is_open())
        {
            for (auto &book : books)
            {
                booksfile << book.getID() << endl;
                booksfile << book.getTitle() << endl;
                booksfile << book.getAuthor() << endl;
                booksfile << book.getNumber() << endl;
            }
            booksfile.close();
        }
        if (adminsfile.is_open())
        {
            for (auto &admin : admins)
            {
                adminsfile << admin.getUsername() << endl;
                adminsfile << admin.getPassword() << endl;
                adminsfile << admin.getName() << endl;
            }
            adminsfile.close();
        }
        if (membersfile.is_open())
        {
            for (auto &member : members)
            {
                membersfile << member.getUsername() << endl;
                membersfile << member.getPassword() << endl;
                membersfile << member.getName() << endl;
                membersfile << member.getPhone() << endl;
            }
            membersfile.close();
        }
    }
};

int main()
{
    Library library;
    library.run();
    return 0;
}