Re: [open-cobol-list] About the Overflow

[Peg]

Hello Alain Lucari,
Alain Lucari wrote:
> There is no more problem with compute or subtract
> than with add.
>
> The problem is :
> - no "on size error" in your samples,
> - your pic 9(2) is UNSIGNED :
>   1 - 3 = -2
>  unsigned, the result is 2
>  There is no overflow in this case !
Thank you for a detailed explanation.

Right. I was misunderstanding it.
this overflow works perfectly as expected.

When thinking about the problem again
As for it, I noticed there was no relation as the overflow.

------------------------------
WORKING-STORAGE SECTION.
01 DATA1 PIC 9(2) VALUE 5.
01 DATA2 PIC 9(2) VALUE 5.
PROCEDURE DIVISION.
COMPUTE DATA1 = DATA1 - 1.
SUBTRACT 1 FROM DATA2.
DISPLAY DATA1 DATA2.
$ cobc TESTFLOW.COB -free
$ ./TESTFLOW
04 04

$ cobc TESTFLOW.COB -free -std=mf
04 96
------------------------------

5 - 1 = 96 ?
I do not understand this calculation result.
Am I also misunderstanding anything?

Best regards,

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