FLOATING NULL?

[Henry Spencer]

In article <13223 at uhccux.uhcc.Hawaii.Edu> karl at wiliki.UUCP (Karl Ihrig) writes:
>...blank spots in my real world data.  I am totally baffled.  How do I
>mark the float element of the array as null, blank, or not
>available?

There is no portable way except allocating a separate flag for each of
your float values.  C does not guarantee the existence of any "blank" value
in floating point, and indeed a good many machines have no such special
value.  If you are willing to constrain your code to run on machines using
IEEE floating point, you could use a NaN value... but there is no standard
way of generating such a value or testing for it.
-- 
"We're thinking about upgrading from    | Henry Spencer @ U of Toronto Zoology
SunOS 4.1.1 to SunOS 3.5."              |  henry at zoo.toronto.edu  utzoo!henry