# sign at top of file

[utzoo!decvax!wivax!dyer]

In the pre-phototypesetter V6 distribution of C, the C preprocessor
was only run on a source file if the first char of the file was a
'#'.  I guess this was for efficiency--you see, the STDIO package
hasn't yet been invented, and MANY C programs didn't use the features
of CPP at all.  It took me a long while to get out of the habit of always
including a '#'; indeed, I preferred the form:
#
#include "xx.h"
with a '#' as a line of its own.

/Steve Dyer