Low Level Design for Hotel Management System

NOTE: This is my first attept in building Low Level Design for a Hotel Management System. Help me improve this project with respect to code quality, implementation details and suggesting some features.

Inside src directory we find the following header files:

1. enum.h - Contains different user-defined room types
2. Hotel.h - Hotel class is a collection of rooms and simultaneous featues like availableRooms(), comparingRooms etc.
3. Room.h - Contains details about Room Class and attributes like price, ratings, RoomType(derived from enum)
4. System.h - Header file with which the user interacts for booking hotel, checking availability, calculating bill etc.
5. User.h - Contains details about the user(name, age, AADHAR_ID, email, phone number)