RE: Preventing a divide by zero error

Sorry, Clay, Jerry is right. I was assuming you were asking what would
happen if you'd didn't check for a zero NETPRICE, but you were asking
what your modified code would do if NETPRICE was zero, and, as he said,
GROSSPCT would have whatever value it had before going through this
code.

Trevor Briggs
Analyst/Programmer
Lincare, Inc.
(727) 431-1246
TBriggs2@xxxxxxxxxxx

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Briggs, Trevor
(TBriggs2)
Sent: Monday, June 24, 2013 10:40 AM
To: RPG programming on the IBM i (AS/400 and iSeries)
Subject: RE: Preventing a divide by zero error

<SNIP>
I was really wondering what the output would look like if the program
ran through without doing the division.
</SNIP>

The program will crash with a divide-by-zero error.

BTW I wholeheartedly agree with what others are saying - you should
ditch that book. I haven't seen code like that since the System/38!

Trevor Briggs
Analyst/Programmer
Lincare, Inc.
(727) 431-1246
TBriggs2@xxxxxxxxxxx

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Clay B Carley
Sent: Monday, June 24, 2013 10:25 AM
To: RPG programming on the IBM i (AS/400 and iSeries)
Subject: Re: Preventing a divide by zero error

Thanks to everyone who replied; I will be purchasing some new books
soon, and probably signing up for an online course as well.

As far as the original divide by zero problem, here's the result:

#1. I had my variables backwards in the equation. :) Here's how it
ended up:

0044.00 C EVAL *IN10 = ( NETPRICE = 0 )
0045.00 C N10 EVAL (H) GROSSPCT = GROSSPRFT / NETPRICE

#2. Apparently none of the data running through the program caused a
divide by zero

I was really wondering what the output would look like if the program
ran through without doing the division. I may still enter data in the
table to cause this issue to occur, just because I'm curious.

I looked through the previous chapters again, and the best I can find is

they mention that you can condition a line using indicators. But no
mention of what they actually do to condition the line.

I'm working on the next programming assignment at the end of Chapter 5
right now, and I absolutely agree that this book is not very good.
Thankfully, I didn't pay anywhere near full price for it; I think I
found it on ebay for $15.

Thanks again everyone!
Clay Carley
Sonic.net/ Sonic Telecom

Jon Paris wrote:

Oh good grief! I had never heard of a book by Stanley so I just

figured it was a typo. Learn something new every day <grin>. e.g. a)
There is an RPG book by a "Stanley Meyers" and b) It's not very good.
Just checked it on Amazon and that puppy is expensive - it is also
somewhat ancient as reflected by the "AS/400" in the title.

On 2013-06-23, at 11:15 PM, Scott Klement <rpg400-l@xxxxxxxxxxxxxxxx>

wrote:

It's a completely different book from the Bryan Meyers / Jim Buck

book.

(Stanley Meyers <> Bryan Meyers)

But, I completely agree with the recommendation. Jim & Bryan's book

is

(IMHO) the best book for learning RPG.

On 6/23/2013 7:12 PM, Jon Paris wrote:

The best thing would be for him to get the current version of the

same book. Jim Buck worked with Bryan to significantly update it and
the teach sequence is radically improved. It has probably a 2011 or 2012
publishing date. This is the one
http://www.amazon.com/Programming-RPG-IV-Jim-Buck/dp/1583473556 and at
less than $40 it is a bargain. I don't understand the reviews that rate
it poorly - I have to believe they are for the previous version which
had gotten rather messy. The current version was a total rewrite by the
guy (Jim Buck) who run the most successful IBM i college program going.

The Sorcerers Guide is for when they have finished with this book.


On 2013-06-23, at 3:15 PM, Booth Martin <booth@xxxxxxxxxxxx> wrote:

I took it from Clay's response that the book was clear . "...

that

section is there just in case you run into those functions later

on. ...

." In 1998 that was highly likely.

Is a "Sorcerer's guide" a better choice for Clay to learn? Or is

that

aimed at intermediate & advanced students?

http://www.redbooks.ibm.com/redbooks/pdfs/sg245402.pdf



On 6/22/2013 5:12 PM, Jon Paris wrote:

Clay - that represents a very old (very, very old) version of the

RPG IV language and frankly you are doing yourself no favours using that
version to teach yourself the language. Even if a lot of programmers are
still writing code like it was 1998.

Try and find a more up-to-date version - it will be worth the

effort.

On 2013-06-22, at 10:07 AM, Clay B Carley <cbc@xxxxxxxxx> wrote:

Hi Vern and Jon,

I don't see a version or edition on this book, but it is dated

1998.

In chapter 5, they talk about "traditional RPG arithmetic

operations",

but also say that section is there just in case you run into

those

functions later on.

Thanks again to everyone who replied!

Clay Carley

--
Booth Martin
802-461-5349
http://www.martinvt.com
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www.SystemiDeveloper.com

--
This is the RPG programming on the IBM i (AS/400 and iSeries)

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Jon Paris

www.partner400.com
www.SystemiDeveloper.com