RE: Random number generation

Peter,

Typically with random numbers, you use the random number returned on the
first call to the API as the SEED value for the second call to the API
and so on.

Bob Cozzi
cozzi@rpgiv.com
Visit the on-line  Midrange  Developer  forum at: http://www.rpgiv.com


> -----Original Message-----
> From: rpg400-l-admin@midrange.com [mailto:rpg400-l-admin@midrange.com]
On
> Behalf Of Peter Colpaert
> Sent: Wednesday, January 16, 2002 1:14 AM
> To: RPG400-L@midrange.com
> Subject: Random number generation
>
> Hi,
>
> I am having some trouble using the CEERAN0 API for generating random
> numbers.
>
> The problem is that I do get back some random numbers, but every time
I run
> the program, it's the same 'random' numbers that are generated.
>
> Maybe I'm just overlooking some trivial thing, but here's (part of)
the
> code.  I want to generate 3 random numbers between 1 and 6, and use
them to
> set on 3 indicators between 11-16, 21-26 and 31-36.
>
> D  S              S              2s 0
> d  indic          s              2s 0
>  *
> D  C0SEED         S              5I 0 Inz(0)
> d  C0RNDNBR       S              8F
>
> c                   movea     '000000'      *in(11)
> c                   movea     '000000'      *in(21)
> c                   movea     '000000'      *in(31)
>  *
> C                   DOU       S >= 1 and s < 7
> C                   CALLB     'CEERAN0'
> C                   PARM                    C0SEED
> C                   PARM                    C0RNDNBR
> C                   PARM                    *OMIT
> C                   EVAL      S = %DECH(C0RNDNBR:30:29) * 7
> C                   ENDDO
>  *
> c                   eval      indic = 10  + s
> c                   eval      *in(indic) = *on
>  *
> C                   DOU       S >= 1 and s < 7
> C                   CALLB     'CEERAN0'
> C                   PARM                    C0SEED
> C                   PARM                    C0RNDNBR
> C                   PARM                    *OMIT
> C                   ENDDO
>  *
> c                   eval      indic = 20  + s
> c                   eval      *in(indic) = *on
>  *
> C                   DOU       S >= 1 and s < 7
> C                   CALLB     'CEERAN0'
> C                   PARM                    C0SEED
> C                   PARM                    C0RNDNBR
> C                   PARM                    *OMIT
> C                   EVAL      S = %DECH(C0RNDNBR:30:29) * 7
> C                   ENDDO
>  *
> c                   eval      indic = 30  + s
> c                   eval      *in(indic) = *on
>
> Any suggestions would be highly appreciated.
>
> Peter Colpaert
> Application Developer
> Honda Europe NV
> ----------
> Program documentation is like sex: when it is good, it is very, very
good; and
> when it is bad, it is better than nothing.
> ----------
>
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