__LINE__ and __FILE__ -- a beginner's question

[Henry Spencer]

In article <6257 at arcturus> evil at arcturus.UUCP (Wade Guthrie) writes:
>For what purpose are the __LINE__ and __FILE__ macros used?  Are these
>only useful for the writers of code that, in turn, produces compileable
>code, or is there some use for the applications programmer?

Their only major use is for generation of error messages that identify
the exact location of the problem.
-- 
A bit of tolerance is worth a  |     Henry Spencer at U of Toronto Zoology
megabyte of flaming.           | uunet!attcan!utzoo!henry henry at zoo.toronto.edu