As I mentioned, the error occured because the compiler (gcc this time) couldn't find the header file "unp.h".

I'm not sure how the program works, but apparently it consists of two files, the main program "daytime.c" and header file "unp.h". daytime.c contains the main routines of the program and uses some macros, structures, etc (like MAXLINE) defined in unp.h. BOTH must exist in the same directory in order to compile successfully.

So, find your unp.h file, put it in the same directory as daytime.c and try to recompile. HTH. Good luck.

Peace always,
<jdenny>