[TUHS] v7 K&R C

[ron at ronnatalie.com]

> Ah yes.  A long time ago, some one came to me with a mysteriously behaving
> Pr1me FORTRAN program; after much head scratching, I found where they were
> changing the value of "0".
>

It was right up there when I traced a bug to find someone had added this
line to one of the headers:

#define notdef 1