Project $2$ Airline Seat Reservations

Write a program to assign passenger's seats in a small airplane.$$ Assume the plane has its seats numbered as follows:

Row

$1$ A B C D

$2$ A B C D

$3$ A B C D

$4$ A B C D

$5$ A B C D

$6$ A B C D

$7$ A B C D

$$

To reserve a seat, the user should enter the row $(1-7)$ and seat $($A $-$ D$).$ Here are the error conditions when checking for a specified seat entered by the user:

the row is not between $1$ and $7$

the seat is not$$ A$,$ B$,$ C$,$ or$$ D

the seat at that row$/$column combination is already reserved

In any of the three cases, print an error message and prompt for the next seat to reserve.

Model the seats in the plane using a two$-$dimensional array with $7$ rows representing the seat rows and the columns representing the $4$ seats in that row.

Use a loop in your program which continues to prompt for a seat to reserve until either the user specifies a sentinel to stop the program, or when all seats are reserved.

After a seat is reserved, the program should display the seat reservation pattern, with an $\text{'}$X$\text{'}$ marking the seats already assigned.$$ If a seat isn't reserved, then print its seat letter $($A$,$ B$,$ C$,$ or D$).($See the example below.$)$For example, after seats $1$A$,2$B$,4$D$,$ and $6$C are reserved, your display might show the following:

Row

$1$ X B C D

$2$ A X C D

$3$ A B C D

$4$ A B C X

$5$ A B C D

$6$ A B X D

$7$ A B C D

There are $24$ seats available.