in the IDE not getting an output
lazarus / 11-Options

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phantom21 · 2018-02-07 22:23

I've tried running a program.  Works in the command line IDE, but
don't get an output from the Lazarus GUI.  Further, there may be n
issue with configuration.  Running Linux, so where are the "sources"
for configuration?  Thanks.

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howardpc · 2018-02-07 22:51

Is your app a console program?
If so, do you have the Console window open (View->Debug
Windows->Terminal Output)?

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phantom21 · 2018-02-08 00:05

No.  the console program is doing properly.  The problem is with the
GUI (Lazarus) app.

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howardpc · 2018-02-08 11:00

If you share the sources to the misbehaving program, the cause will
probably be obvious to someone on this forum.

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phantom21 · 2018-02-09 04:29

what do you mean sources?

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Thaddy · 2018-02-09 07:27

source code

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phantom21 · 2018-02-09 15:26

I've written some simple source code for testing and retraining
myself.  It works completely nad properly in the CLI IDE, but, while
it is EXACTLY the same in the GUI (Lazarus) IDE and compiles, it does
not show the output.  Here's the code.
PROGRAM Test_While ;

VAR
  x, y : INTEGER;

  PROCEDURE Loop(inner, outer: INTEGER) ;

  VAR
  inner1 : INTEGER ;

  BEGIN

    WHILE outer > 0 DO
    BEGIN
      inner1 := inner ;

      WHILE inner1 > 0 DO
      BEGIN
        WRITE('outer = ', outer);
        WRITELN('   inner = ', inner1);
        inner1 := inner1 -1 ;
      END ;
      outer := outer - 1 ;

    END ;
  END ;

BEGIN

  x := 4;
  y := 7;

  Loop(x,y);
  READLN ;

END.               

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rvk · 2018-02-09 15:49

Quote from: phantom21 on February 09, 2018, 04:26:28 pmIt works
completely nad properly in the CLI IDE, but, while it is EXACTLY the
same in the GUI (Lazarus) IDE and compiles, it does not show the
output.How did you "create" this GUI program?

If you did it in Lazarus and just copied the code you should have
gotten an error.

You can't just use writeln() in a GUI program.

Just begin with creating a propper GUI-application with Project > New
Project and choose Application.
Go from there. (But note that GUI-programming is completely different
from console-programming)

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taazz · 2018-02-09 15:51

start the lazarus IDE go to the menu project\New Project on the dialog
that appears select "simple program" copy the code you posted here and
paste it in the unit created then run. Does it create any output?Quote
from: rvk on February 09, 2018, 04:49:45 pmQuote from: phantom21 on
February 09, 2018, 04:26:28 pmIt works completely nad properly in the
CLI IDE, but, while it is EXACTLY the same in the GUI (Lazarus) IDE
and compiles, it does not show the output.How did you "create" this
GUI program?

If you did it in Lazarus and just copied the code you should have
gotten an error.

You can't just use writeln() in a GUI program.
I thought that in linux there is no differenc between gui and console
all applications where console applications they just did not open the
console window by default.

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rvk · 2018-02-09 16:25

Quote from: taazz on February 09, 2018, 04:51:38 pmI thought that in
linux there is no differenc between gui and console all applications
where console applications they just did not open the console window
by default.
Ha, yes, you're correct. I see there is no error given under Linux.

I also see now what phantom21 means by not having a console window in
Lazarus IDE when running a simple console application. It doesn't
appear automatically like in Windows.

@phantom21, you can choose View > Debug Windows > Terminal Output or
press Ctrl+Alt+O to get the window you want with your output/input.

The other option is Run > Run parameters and check the "Use launching
application" checkbox.
(it's in the wiki: http://wiki.freepascal.org/Console_Mode_Pascal)

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phantom21 · 2018-02-10 19:52

thanks, I tried all of those options and I get a message window with
these messages:

Panic: internal error: Access violation Compile Project, Target:
Test_For: Access violation
  $0000000000F1BC84
  $0000000000F1C727
  $0000000000F1C6A6
  $000000000094C502
  $000000000095164C
, Errors: 6
Panic: internal error: Access violation
Panic: internal error:   $0000000000F1BC84
Panic: internal error:   $0000000000F1C727
Panic: internal error:   $0000000000F1C6A6
Panic: internal error:   $000000000094C502
Panic: internal error:   $000000000095164C

These do not show in the CLI compile and run.
 

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rvk · 2018-02-14 20:44

Quote from: phantom21 on February 10, 2018, 08:52:00 pmPanic: internal
error: Access violation
Maybe your Lazarus installation is screwed up.
Kinda sounds like the same problem as here:
https://forum.lazarus.freepascal.org/index.php/topic,35743.0.html

Not sure what Linux version and Lazarus version you have (and how you
installed it) but maybe installing it with fpcupdeluxe could help (it
did in the other topic).