int id;

string username;

string password;

bool is_admin;

int balance;

string phone;

string address;

int user_fd;

bool signed_in;

User(int id, string username, string password, bool is_admin, int balance, string phone, string address);

User(int id, string username, string password, bool is_admin);

User(int id, string username);

void set_password (string _password);

void set_balance (int _balance);

void set_phone (string _phone);

void set_address (string _address);

int get_id();

string get_username();

string get_password();

bool is__admin();

int get_balance();

string get_phone();

string get_address();

int get_user_fd();

bool is_signed_in();

void show_info();

string get_info();

string get_full_info();

void sign_in(int _user_fd);

void sign_out();