Create 6 terminals:

1. 1 cleanup
2. 1 ATC
3. 2 airports
4. 2 planes

however, you can create any number of planes and airports you want.

Type the following commands in the terminal for the respective .c file:

1. cleanup.c :

    gcc cleanup.c -o cleanup
    ./cleanup

2. airtrafficcontroller.c :

    gcc airtrafficcontroller.c -o atc
    ./atc

3. airport.c :

    gcc airport.c -o airport -lpthread
    ./airport

4. plane.c :

    gcc plane.c -o plane
    ./plane