RE: Anyone need a random number generator?

 

-----Original Message-----
From: [email protected] [mailto:[email protected]] On
Behalf Of Rick Fochtman
Sent: jeudi 29 avril 2010 20:19
To: [email protected]
Subject: Re: [turnkey-mvs] Anyone need a random number generator?


  

 ------------------------------<snip>---------------------------------------



On Wed, Apr 28, 2010 at 12:39 PM, Rick Fochtman <rfochtman@ync.
<mailto:[email protected]> net> wrote:

 

//SYSLMOD DD DSN=SYS1,FORTLIB(IRND),DISP=SHR  <-- member name is LMOD name
when link is complete


 -----------------------------------------------------------^^^^^

Rick
<mailto:[email protected]?subject=Anyone%20need%20a%20random%20number%20ge
nerator?>
<mailto:[email protected]?subject=Anyone%20need%20a%20random%20num
ber%20generator?>
<http://groups.yahoo.com/group/turnkey-mvs/post;_ylc=X3oDMTJwYjNyZWxhBF9TAzk
3MzU5NzE0BGdycElkAzgxNjExNjIEZ3Jwc3BJZAMxNzA1MDA2NTU5BG1zZ0lkAzY1MzQEc2VjA2Z
0cgRzbGsDcnBseQRzdGltZQMxMjcyNDcyNDYz?act=reply&messageNum=6534> 




If I wanted to add other subroutines or functions to the source code would
that be ok too?

or should I duplicate this whole file and change names?


---------------------------------<unsnip>------------------------------
You might want to build a separate library for your additions; in my own way
of thinking, I'd call it "SYS2.FORTLIB" and add it to the SYSLIB
concatenation in any LINKEDIT or LOADER steps in my FORTRAN procs. That
might be helpful in separating your routines from the IBM-supplied library.

Rick




 
 
 Ron  

In addition to building a separate library for your user stuff IMHO you
would be better off by having a separate module for each subroutine or
function you require.
Puting it all in one module will :
- limit you to a maximum of 16 functions (1 main entry point + 15 aliases
for the secondary EPs IIRC) per module (which also means that if you write
more than 16 routines you'll have to remember in which 
  module a particular function is)
- increase the size of the final load module beyond what is really necessary
- increase the size and complexity of the source code
- introduce the possibility of accidentally clobbering perfectly good code
in function B while adding/modifying function C then spend hours trying to
figure out what happened
- in the same vein introduce subtle side effects between two or more
functions 
I haven't coded in FORTRAN so I don't how easy/difficult it is to code
secondary entry points for this FORTRAN compiler  (I have done it in COBOL &
PL/I though, which is how I found out about the 16 EPs limitation)
HTH
John