RE: Complete subfile program supported in C++

MANY years ago, at a previous employer, we had a COBOL programmer for the payroll application. But, all she had ever done in COBOL was batch and did not know RPG. She was tasked with building a menu/driver for retrieving Time & Attendance files from our 11 remote UNIX boxes. So, she went for it in CL.

This was way before CL subroutines were ever even a glint in IBM's eye.

Never before or since have I seen such a CL. The prompting was about 3 or 4 screens deep. She used a TON of indicators - several for controlling/tracking each site. It actually worked quite well - but, what a sight to see the code.

Roger Harman
COMMON Certified Application Developer - ILE RPG on IBM i on Power

-----Original Message-----
From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of Vern Hamberg via MIDRANGE-L
Sent: Sunday, July 23, 2023 8:32 PM
To: midrange-l@xxxxxxxxxxxxxxxxxx
Cc: Vern Hamberg <vhamberg@xxxxxxxxxxxxxxx>
Subject: Re: Complete subfile program supported in C++

Hi Thomas

Well, I don't know if I can agree that *...one should be able...* to use
any supported language on i to work with subfiles. Hey, how about MI?

Just kidding! I often do say *a language is a language is a language* to
mean basically what you say. At the same time, some languages are
designed to make certain kinds of programs easier to write. Such is the
case with RPG and business applications. COBOL might be a 2nd choice. Oh
- I forgot to mention that you can write full-function display apps in
CL, right? I've come to a place where I want to take my time with things
that most easily accomplish what I want to get done.

Just thoughts!

Vern

On 7/23/2023 10:11 PM, Thomas Burrows wrote:

Will repost under the C language area. Just because I want to be able to do
it.

One should be able to take any display file that supports subfiles and call
it from
COBOL
RPG
C++
any other supported language off the IBM Power i, AS400, or IBM i Series

Thomas

On Sun, Jul 23, 2023 at 10:04 PM Scott Klement<midrange-l@xxxxxxxxxxxxxxxx>
wrote:

In my experience, people don't typically write subfiles in C/C++ - these
languages are usually used to write system tools and the like rather
than business applications.

Of course, you can do the same thing in C++ that you would do in any
other language -- so find an RPG or Cobol example and just do the C/C++
equivalent -- that's what I'd do. The _Ropen routine and all of it's
related functions provide the same functionality as the corresponding
RPG native I/O routines, so a couple of minutes looking them over in the
manual is typically all you need.

Strongly recommend that you join and ask your question in the C400-L
mailing list if you need deeper discussion.

On 7/23/23 1:02 AM, Thomas Burrows wrote:

All I can find in V7R4 C++ manual is a LOAD ALL subfile program with no

ADD
Change
Delete

Capacity. Does anyone have a full subfile in C++

--
Scott Klement
http://www.scottklement.com/

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