To run the program:

Put the PL/0 code into a file named pl0.txt

Put pl0.txt into the folder with scanner.c, parser.c, virtualmachine.c, and controller.c

Compile controller.c with a C compiler

Run the executable file that was produced by the compiler

Note: Running with -l prints out lexemes, -a prints out assembly, -v prints out the output.
The program can be run with any combination of the above.