Code for this in C: Implement a c program using the single-subscripted array and its operations  with emphasis on the creation of programmer-defined data types and the  use of separate files for the definition - .h, implementation - .c and client  code - .c.

Code for this in C:

Implement a c program using the single-subscripted array and its operations 
with emphasis on the creation of programmer-defined data types and the 
use of separate files for the definition - .h, implementation - .c and client 
code - .c.

Remember to make a project and use data abstraction.

Project name : Airline 
Filenames: airline.h, airline.c, main.c

Airline Reservation System 
A small airline has just purchased a computer for its new automated reservations system. The president 
has asked you to program the new system. You are to write a program to assign seats on each flight of 
the airline's only plane (capacity: 10 seats). 

Your program should display the following menu of alternatives: 
Please type 1 for "first class" 
Please type 2 for "economy" 

If the person types 1, then your program should assign a seat in the first class section (seats 1-5). If the 
person types 2, then your program should assign a seat in the economy section (seats 6-10). Your program 
should then print a boarding pass indicating the person's seat number and whether it is in the first class or 
economy section of the plane. 

Use a single-subscripted array to represent the seating chart of the plane. Initialize all the elements of the 
array to 0 to indicate that all seats are empty. As each seat is assigned, set the corresponding elements of 
the array to 1 to indicate that the seat is no longer available. 

Your program should, of course, never assign a seat that has already been assigned. When the first class 
section is full, your program should ask the person if it is acceptable to be placed in the economy section 
(and vice versa). If yes, then make the appropriate seat assignment. If no, then print the message "Next 
flight leaves in 3 hours." 

Use and implement the following functions: 

void initSeats(int seats[], int size);//initializes seats to 0 
void displaySeats(int seats[], int size);//displays seats 
int assignSeat(int st[], int seatType);//returns 1 if assignment of seat is successful, calls 
assignFirstClass() if seatType is 1 and assignEconomy if seatType is 2 
int assignFirstClass(int seats[], int size);//assigns seat and returns seat number, if there's no available 
seat, returns -1 
int assignEconomy(int seats[], int size);//assigns seat and returns seat number, if there's no available 
seat, returns -1 
void boardPass(int seat);//displays the boarding pass 
void exxit(void);//displays exit message if all seats are already taken or when the person doesn't want 
to take a seat.