You run four computer labs. Each lab contains computer stations that are

numbered as shown in the table below:

Each user has a unique five-digit ID number. Whenever a user logs on, the

user’s ID, lab number, and the computer station number are transmitted

to your system. For example, if user 49193 logs onto station 2 in lab 3,

then your system receives (49193, 2, 3) as input data. Similarly, when a

user logs off a station, then your system receives the lab number and

computer station number.

Write a computer program that could be used to track, by lab, which user

is logged onto which computer. For example, if user 49193 is logged into

station 2 in lab 3 and user 99577 is logged into station 1 of lab 4 then

your system might display the following:

Lab Number Computer Station Numbers

1 1–5

2 1–6

3 1–4

4 1–3

Lab Number Computer Stations

1 1: empty 2: empty 3: empty 4: empty 5: empty

2 1: empty 2: empty 3: empty 4: empty 5: empty 6:empty

3 1: empty 2: 49193 3: empty 4: empty

4 1: 99577 2: empty 3: empty

Create a menu that allows the administrator to simulate the transmission

of information by manually typing in the login or logoff data. Whenever

someone logs in or out, the display should be updated. Also write a search

option so that the administrator can type in a user ID and the system will

output what lab and station number that user is logged into, or “None” if

the user ID is not logged into any computer station.

You should use a fixed array of length 4 for the labs. Each array entry

points to a dynamic array that stores the user login information for each

respective computer station.

The structure is shown in the figure below. This structure is sometimes

called a ragged array since the columns are of unequal length.