About comp, comp2, comp1, comp3, comp4

trendz · New User Joined: 12 Aug 2003 Posts: 2

where should we use these these comps
for what purpose we use comps

mcmillan · Site Admin Joined: 18 May 2003 Posts: 1210 Location: India

Dear,

You can use comp variables:

1. For effective arithmatic calculations
2. For saving memory/register area
3. For faster program execution time

Some applications of comp items are
1. Counters
2. Incrementers
3. Loop variables
3. System internal data

Use COMP-1 FOR FLOATING POINT data when digits<= 8

Use COM-2 for higher floating points

Use COMP-3 for decimal data.

Refer ibmmainframes.com/size.html for more info.

DNelsonPNC · Posted: Fri Oct 17, 2003 5:33 am

COMP is binary integer data, 9(4) is 2 byte integer (-32768 - +32767)
9(9) is full word (4 byte integer); 9(18) is double word (8 byte integer)
Less than the number of digits per size are rounded up by the compiler to the next higher (i.e 9(2) is same as 9(4); 9(5) is same as 9(9); 9(10) is same as 9(18).

This a part of the COBOL standard and does not vary by platform. The way the data is stored may vary by platform (i.e. Mainframe does not store binary the same way a PC stores binary.)

This is also explained in detail in the language reference manuals.

khamarutheen · Active Member Joined: 23 Aug 2005 Posts: 677 Location: NJ

hi frnd,

check this link for more about COMP

www.discinterchange.com/TechTalk_COBOL_comp_.html