what type of characters will store in last nibble of COMP-3

vinayak · New User Joined: 30 Jan 2004 Posts: 3

In comp-3 the sign will store in last nibble. what type of characters we can see in the last nibble.

mdtendulkar · Active User Joined: 29 Jul 2003 Posts: 237 Location: USA

Hello vinayak,

Please go through the link below for more details.

www.cis.scu.edu.tw/oproom/doc/acucobol/docs/comprun/gt400419.htm

Hope this helps

Regards

Mayuresh Tendulkar

ksivapradeep · New User Joined: 30 Jul 2004 Posts: 95

hi vinayak,

the sign values are stored in last nibble like this

ex: -124

this value stored as a 124m

why it is ok,see below

the sign is stores like this
A B C D E F G H I
+1 +2 +3 +4 +5 +6 +7 +8 +9

J K L M N O P Q R
-1 -2 -3 -4 -5 -6 -7 -8 -9

}
0

depends upon the last value in the given value it stores the corresponding letter.

in our examplle the last number in the value is '4' so it store as 'M' finally the value is 124M in comp's in normal it gives 12M ok.

if any thing wrong let me know i will verify ok

regards
siva pradeep

muthukumar · New User Joined: 24 Mar 2004 Posts: 29

Hi friends,

COMP-3 variable will save the sign bit in the last nibble separately. It can take value of C, F or D. where C,F denotes Positive and D for negative.

let me know if any clarifications required. Vinayak, Can you test this and let me know on what u get. its very easy to test this.

regards
Muthu

vikas4u · New User Joined: 12 Aug 2004 Posts: 14 Location: bangalore

In comp-3 the sign is stored in last nibble.
i.e if the value is +100 then the value will be 0C. ( zero c )
+101 then 1C
+102 then 2C

if -100 then 0D
-101 THEN 1D
-102 THEN 2D