Study the factors which affect the resistance of a wire.

For each room in the hotel, a room record is kept. The collection of room records form the room file. A room record contains information such as:

Room number

 Room type

Room rate

Facilities present

 Name of occupant (this is blank if room is available)

Date of arrival

Date of departure etc.

This allows the user to easily answer quarries such as:

1. Is room 1002 available?
2. When will room 1002 be available?
3. What is the summer season rate of room 1002 for 3 people?

For each customer who wants to book a room at the hotel, a booking record is kept. The collection of booking records forms the booking file. This record contains the following information:

Name of person

Address

Telephone

Identification (passport number or driving license number)

Expected date of arrival

Expected date of departure

Room type requested

Room assigned

By accessing the booking file and the room file, the system can automatically allocate a room to the customer, as follows:

1. Using the booking file, determine the expected date of arrival and the type of room requested by a customer
2. Using the room file, find a room of the type requested which becomes available on the expected date of arrival
3. Insert the room number in the room assigned field of the booking record.