[Simh] anyone know how to convert/translate turbo pascal to vax pascal?

[Jeremy Begg]

Despite porting the program from VAX Pascal to various flavours of other Pascal, it seems you don’t recall much about the language.
Moving from Pascal to BASIC would be quite an exercise.

In VAX Pascal the reserved identifiers INPUT and OUTPUT refer to SYS$INPUT and SYS$OUTPUT, respectively.
Here’s a simple program which prompts for user input.

program hello(input,output);
var s : varying [80] of char;
begin
write('What is your name? ');
while not eof(input) do
    begin
    readln(s);
    if length(s) > 0 then break;
    write('What is your name? ');
    end;
writeln('Hello ', s);
end.

	Jeremy

> On 8 Feb 2018, at 4:49 PM, Dan Gahlinger <dgahling at hotmail.com> wrote:
> 
> I found a hello world pascal example online for vms,
> so at least that much I can get working.
> 
> however, all the docs online are not so useful for programming itself.
> my code has input and output from the terminal and from files.
> the hello program uses: program hello(output);
> so not sure how to do in and out from the terminal.
> tried googling examples but no such luck beyond hello world.
> 
> it might be easier for me to port to vax basic, I used to be an expert at that, many moons ago.
> 
> Dan.
> From: Simh <simh-bounces at trailing-edge.com <mailto:simh-bounces at trailing-edge.com>> on behalf of Jon Elson <elson at pico-systems.com <mailto:elson at pico-systems.com>>
> Sent: February 7, 2018 9:25 PM
> To: simh at trailing-edge.com <mailto:simh at trailing-edge.com>
> Subject: [Simh] anyone know how to convert/translate turbo pascal to vax pascal?
>  
> On 02/07/2018 05:57 PM, simh-request at trailing-edge.com <mailto:simh-request at trailing-edge.com> wrote:
> > [Simh] anyone know how to convert/translate turbo pascal to
> >        vax     pascal?
> > Message-ID:
> >        <DM3PR16MB0813E13BB9F23F23569DB71AC9FC0 at DM3PR16MB0813.namprd16.prod.outlook.com <mailto:DM3PR16MB0813E13BB9F23F23569DB71AC9FC0 at dm3pr16mb0813.namprd16.prod.outlook.com>>
> >        
> > Content-Type: text/plain; charset="iso-8859-1"
> >
> > since I did all that work recreating "castle" from the vax to the pc
> > using turbo pascal (then free pascal)
> > I'd like to "port" it back to the vax,
> > but the vms 7.3 pascal compiler doesn't recognize "writeln"
> > and I suspect things like types and records and case statements wont work either.
> >
> > anyone have any ideas?
> Umm, I just looked back at some Pascal code I had on VAX 
> Pascal, and it DEFINITELY has writeln statements in it.
> This is such basic Pascal syntax, I can't imagine that did 
> not work.  But, maybe you have to enable some library or 
> Pascal "unit" to use those functions.
> 
> Jon
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