in c program

The software system must provide functionality for the following type of users: - The manager who can set/amend classes for each room and price per class. The hotel contains 50 rooms ( 10 per floor) and three classes (A, B, C) of rooms. Each room is assigned a single price class. The manager can also provide a fixed discount percentage on the regular price for rooms booked at least one month prior to the arrival day, group bookings or any other special circumstances. - The booking operator, who can register a customer (via recording their names, addresses and telephone details). A search facility should be provided for room availability and dates. Additionally, the operator can book one or more rooms to a registered customer and at a regular or discounted price. - The check-in operator who records the arrival of a customer in the system, and can change certain details if possible, such as period of stay, room or customer details, etc. The check-out operator should be able to record leaving customer times, calculate charges or even move the payment from regular to discounted price if the customer was dissatisfied. - The owner of the hotel who needs to see some statistics about the number of customers, breakdown of room prices and frequency of room bookings, monthly booking histograms, number of unhappy customers and group bookings, etc