How can I compute the range of signed and unsigned types

Walter B. Ligon III walt at clemson.edu
Wed Apr 18 13:03:26 EDT 2001


--------
> Errrrr... :-) have fun
> 
> 
> #include <stdio.h>
> 
> #define BYTESIZE(me)    (sizeof(me))
> #define BITSIZE(me)     (2 << sizeof(me))

please excuse my ignorance - but what exactly is BITSIZE doing here?
I don't understand and the results I get don't seem to make sense.
I would have written it as:

#define BITSIZE(me) (8 * sizeof(me))

but of course that assumes 8 bits per byte (which is normal, but not
strictly true (see old CDC machines).

Walt
-- 
Dr. Walter B. Ligon III
Associate Professor
ECE Department
Clemson University



_______________________________________________
Beowulf mailing list, Beowulf at beowulf.org
To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf



More information about the Beowulf mailing list