RE: Random number generation -- RPG400-L

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Subject: RE: Random number generation
From: "Robin Coles" <robin@xxxxxxxxxxxx>
Date: Wed, 16 Jan 2002 09:28:35 -0000
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I think you need to set COSEED to something vaguely random before you
start.  I combine the day number, job number and time as a start point
but there's probably a better way.

255a d BigNum          s             11  0
255a d SmallerNum      s              9  0

255a C                   If        Not SetSeed
     C                   TIME                    XXTMDT
255a C     XXSS          IFNE      0
255a
255a C     Z1JobN        Mult      XXMMSS        BigNum
255a C     BigNum        Div       XxDay         SmallerNum
255a
255a **  Need to use smallernum to control overflow as the max in
255a **  a 10i field is 2147483647
255a
255a c                   Z-Add     SmallerNum    Seed
255a c                   Else
255a C                   Z-Add     Z1JobN        Seed
255a C                   EndIF
255a C                   Eval      SetSeed = *On
255a C                   EndIf
255a
255a **  CEERAN0 generates a pseudo-random number between 0 and 1.
Factor
255a **  up to a 6 digit number once done.  Leave the seed for the next
call
255a
255a c                   CallB     'CEERAN0'
255a c                   Parm                    Seed
255a c                   Parm                    Number
255a c                   Parm                    Feedback         12

Cheers
Robin

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