Question

I am writing a program in pascal. But somehow getting errors whose reasons I dont understand. Can you please help.

Program main;

Procedure A(n : longint);
Procedure B(n : longint);
    Procedure E(n : longint);
        Procedure D(n : longint);
        begin
        WriteLn ('In D. No Call...');
        end;

    begin
    WriteLn ('In E ');
    D(n);
    end;

begin
WriteLn ('In B ');
WriteLn ('Calling A Do -1 ',n);
if n = 1 
 then 
A(1);


end;




begin
  WriteLn ('In A ');
  B(n);
  WriteLn ('Calling B  ',n);
  if(n<1)
  then 
  begin
  C(n);
  end;
  end;

   begin
   A(1);
   end.

I am trying to call proc A from main proc, then A calls B and so on. BUt I get complilation errors in C:

Here are the errors I get:
Free Pascal Compiler version 2.2.0 [2009/11/16] for i386
Copyright (c) 1993-2007 by Florian Klaempfl
Target OS: Linux for i386
Compiling prog.pas
prog.pas(32,14) Error: Identifier not found "C"
prog.pas(32,17) Error: Illegal expression
prog.pas(37,4) Fatal: There were 2 errors compiling module, stopping
Fatal: Compilation aborted
Error: /usr/bin/ppc386 returned an error exitcode (normal if you did not specify a source file to be compiled)

Answer 1

I think you’ve missed out “procedure C”.
I’m not seeing a “procedure C” defined anywhere, the error indicates that the program also cannot see this routine.

Some better indentation could make things a lot clearer, you’re using nested procedures (not really best practice), but procedures A and B have the same level of indentation.