Files
ioccc/2014/endoh2
Landon Curt Noll f64f244ba6 update due to recent commits
The largest change was due to modifying `ioccc.css`
that resulted in all year and entry tarballs being modified.

Ran `make update` to perform the above.
2025-11-25 22:42:46 -08:00
..
2020-12-30 16:57:03 -08:00
2023-07-06 21:49:38 -07:00

To build:

    make

To use:

    ./prog < input > output

Try:

    ./try.sh

Judges' remarks:

If you look closely at the source, you will see code that appears to puts C code that includes itself. How and why? Perhaps it is in the DNA code of the code? Perhaps there are 23 reasons? :-)

Author's remarks:

Remarks

This chromosome program synthesizes a double helix. The helix can also be compiled as a C program.

Enjoy DNA programming!

For more information / background reading:

  • This program was inspired by Acme::DoubleHelix: http://search.cpan.org/~xern/Acme-DoubleHelix-0.01/

  • The synthesized helix just includes the original program at the head. Do you see how prog.c determines whether it was invoked as a standalone program or included as a header file? Note that it does not use any gcc extension such as __INCLUDE_LEVEL__.

  • The synthesized helix of course follows the base-pairing rules for DNA: A is bonding only to T, and C is bonding only to G.