What are the Advantages of using comp-3 variables

kumar40322 · New User Joined: 25 Apr 2009 Posts: 15 Location: Hyderabad

Hi

What are the Advantages of using comp-3 variables?Whether we can see comp-3 variables?If so how?

Douglas Wilder · Posted: Thu Aug 06, 2009 11:19 pm

Each digit only takes 1/2 byte, plus 1/2 byte for the sign (even if it is unsigned).
You may view it the same ways you view other variables but you may need to turn hex on in order to understand it better.

dick scherrer · Posted: Thu Aug 06, 2009 11:26 pm

Hello,

In addition to the space savings, Packed-decimal (comp-3) provides better performance than Zoned-decimal in computations.

Some instructions require packed-decimal data, so if the field is not already packed-decimal, it must be converted to packed-decimal to be used. This is automatically done by the complier, so many people do not even know it happens.

Ketan Varhade · Posted: Fri Aug 07, 2009 8:45 am

Hi,
Have a look at this may be this will help u
for comp3

Terry Heinze · Posted: Fri Aug 07, 2009 9:13 am

The best place to look for how data is stored is the COBOL Language Reference Manual. The Programming Guide, I think, will give tips on which pictures and usage clauses are the best to use for any given purpose.