Worst abuse of the C preprocessor

Jim Hague
https://lunch.org.uk
mailto:jim.hague@acm.org
UK

Judges' comments:

Compile this program and feed ascii text into standard input. This program is known to pass lint on some systems and abort lint on others.

This program was selected for the 1987 t-shirt collection.

Think morse code when you ponder this program. Note how use of similar variables can be obfuscating! The author notes that this program implements the international morse standard. Now for extra credit, what morse message does the program spell out?

Copyright © 1986, Landon Curt Noll & Larry Bassel. All Rights Reserved. Permission for personal, educational or non-profit use is granted provided this this copyright and notice are included in its entirety and remains unaltered. All other uses must receive prior permission in writing from both Landon Curt Noll and Larry Bassel.