dev-cpp-users — Dev-C++ users discussion list

[Dev-C++] Compiler error

[Gary R. <ga...@fi...>]

I'm trying to compile some code that was originally developed under MSVS 6.0
and includes some C++ code that was written by someone else. The error I'm
getting occurs in an include file and is:  "no class template named". A
portion of the code involved is shown below. The compiler flags the line
containing the first opening brace. What could I do to correct this?

Thanks,
Gary Richardson


  class iterator
   : public random_access_iterator_parent(seqref<T>)
   {
  protected:
   friend class SeqBase<T>;
   SeqBase<T>* seq;
   int count;

  public:
   ~iterator ()
    {}

   iterator ()
    {
    seq = 0;
    count = 0;
    }
    .
    .
    .
    };    // end of class SeqBase<T>::iterator

Re: [Dev-C++] I'm so tired...

[<ten...@ne...>]

Yeah, I had -O2, I forgot that, well I turned off optimizations, but 
still the same.
I'll do a try I've not done yet in this case: I'ill delete the block and 
rewrite it exactly as it is now.


Abhijit Shylanath wrote:

>>But this is not the only time I get this kind of error.
>>    
>>
>
>Are you compiling with optimization (-O2 or greater?). If so, try disabling
>optimizations and then see if it works. Optimization levels greater than 2
>are supposed to be risky.
>
>--
>Abhijit Shylanath
>Homepage: http://mudeth.tripod.com/
>
>
>
>-------------------------------------------------------
>This SF.Net email sponsored by: Free pre-built ASP.NET sites including
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>  
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Re: AW: [Dev-C++] dev cpp functions

[<ten...@ne...>]

And add the std:: prefix to all standard library functions or add the 
line using namespace std; beforeusing them. Take a look at namespaces in 
some C++ book or tutorial.

Mathias Lühr wrote:

> Possibly, you have to include <iosream>.
>  
> Mathias
>
>     -----Ursprüngliche Nachricht-----
>     Von: Frédéric JOLY [mailto:Fre...@fo...]
>     Gesendet: Mittwoch, 6. August 2003 09:03
>     An: dev...@li...
>     Betreff: [Dev-C++] dev cpp functions
>
>     hello,
>      
>     i have a problem with i try to compile an example (hello), in DEV-C++
>     i have 4 errors cout ,endl and cin : "first use of these function"
>     why ?
>     could you help me ??
>      
>      
>     fj
>
>          
>

[Dev-C++] Noob needs XP help

[nsrob <ns...@td...>]

Hi all,
   I'm new to Dev and trying to get it configured to XP..I have edited =
the path in myComp..properties..advanced..environmental settings..
and when trying to run the example "Hello" to test it I get this error

 Compiler: Default compiler
Building Makefile: "C:\Dev-Cpp\Projects\Makefile.win"
Executing  make...
make.exe -f "C:\Dev-Cpp\Projects\Makefile.win" all
g++.exe -c main.cpp -o main.o -I"C:/Dev-Cpp/include/c++"  =
-I"C:/Dev-Cpp/include/c++/mingw32"  -I"C:/Dev-Cpp/include/c++/backward"  =
-I"C:/Dev-Cpp/include" =20

'C:\DOCUME~1\Bob' is not recognized as an internal or external command,
operable program or batch file.

The system cannot find the path specified.

make.exe: *** [main.o] Error 1

Execution terminated

Apparently it still trying to access C\Documents & Settings as XP  =
usually does
I'm missing something here.........Any HELP would be greatly appreciated
Thanks=20

Re: [Dev-C++] loop optimization

[Per W. <pw...@ia...>]

As Ioannis already mentioned, the important factor is if the compiler
knows the implementation of the function.

If the compiler has access to the code and can check that it returns a
constant value and doesn't have any side effects, it may - depending on
optimization settings etc - retrieve the end value before intering the
loop.

Whenever the compiler is in doublt, it has to assume that the function has
side effects or returns a nonconstant value, requiring the function to be
called - or the contents of the function to be inlined - for every
iteration of the loop.

/Per W

On Wed, 6 Aug 2003, OROSZI Bal=E1zs wrote:

> David McKen wrote:
> > Ok here is a test I tried on a OLD comp I have lying
> > around.
> >
> > System specifications:
> > 25Mhz 486 (no math co-processor)
> > 4Mb Ram
> > Compiled using the Pacific C compiler (djgpp runs WAY too
> > slow) using full
> > optimization.
> >
> > Program:
> > #include <stdio.h>
> > #include <time.h>
> >
> > long getint(void);
> >
> > int main()
> > {
> >   time_t begin,end;
> >   long i, get_int;
> >
> >   begin =3D time(NULL);
> >   for(i =3D 0; i < getint(); ++i);
> >   end =3D time(NULL);
> >   printf("Function call time taken =3D %i\n", end - begin);
> >
> >   get_int =3D getint();
> >   begin =3D time(NULL);
> >   for(i =3D 0; i < get_int; ++i);
> >   end =3D time(NULL);
> >   printf("Varible buffer time taken =3D %i\n", end - begin);
> >
> >   return 0;
> > }
> >
> > long getint(void)
> > {
> >   return 50000000;
> > }
> >
> > Output:
> > Function call time taken =3D 40
> > Varible buffer time taken =3D 16
> >
> > Hope this helps.
>
> Thank you very much. Actually, I was also doing some benchmarks, and got
> the same result as you. However, that getint() function is not that
> simple :) It does something more complicated.
>
> Anyway, thanks for it.
>
> --
> Greetings,
>    Bal=E1zs
>
>
>
> -------------------------------------------------------
> This SF.Net email sponsored by: Free pre-built ASP.NET sites including
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01
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> https://lists.sourceforge.net/lists/listinfo/dev-cpp-users
>

Re: [Dev-C++] loop optimization

[<or...@vp...>]

David McKen wrote:
> Ok here is a test I tried on a OLD comp I have lying
> around.
> 
> System specifications:
> 25Mhz 486 (no math co-processor)
> 4Mb Ram
> Compiled using the Pacific C compiler (djgpp runs WAY too
> slow) using full
> optimization.
> 
> Program:
> #include <stdio.h>
> #include <time.h>
> 
> long getint(void);
> 
> int main()
> {
>   time_t begin,end;
>   long i, get_int;
> 
>   begin = time(NULL);
>   for(i = 0; i < getint(); ++i);
>   end = time(NULL);
>   printf("Function call time taken = %i\n", end - begin);
> 
>   get_int = getint();
>   begin = time(NULL);
>   for(i = 0; i < get_int; ++i);
>   end = time(NULL);
>   printf("Varible buffer time taken = %i\n", end - begin);
> 
>   return 0;
> }
> 
> long getint(void)
> {
>   return 50000000;
> }
> 
> Output:
> Function call time taken = 40
> Varible buffer time taken = 16
> 
> Hope this helps.

Thank you very much. Actually, I was also doing some benchmarks, and got 
the same result as you. However, that getint() function is not that 
simple :) It does something more complicated.

Anyway, thanks for it.

--
Greetings,
   Balázs

Re: [Dev-C++] loop optimization

[Luís B. <lf...@ya...>]

--- David McKen <ci...@ya...> wrote:
> I like dos. Anyway I don't use it for everyday tasks. Only
> for doing some
> long calculation that I don't want to give my main system.
> 
> Someone had asked wether it would be better to constantly
> re-call a function
> in a for loop or t copy the value to a varible and use that
> instead.
> 
> The idea was to show the code running on an extremly slow
> system (with
> absolutely no bells and whistles) so a relatively decent
> comparison could be
> made. Besides, if I did not have this system I would have
> to make getint()
> return a much bigger number (most comps today go through
> 50,000,000 too fast
> for time() to give a different time reading)
> 
> Who messed with my output? It is supposed to be:
> Function call time taken = 40
> Varible buffer time taken = 16
> 
> 
> 
> ----- Original Message ----- 
> From: "Scott Simontis SIMONTIS" <age...@co...>
> To: <ci...@ya...>
> Sent: Tuesday, August 05, 2003 7:57 PM
> Subject: Re: [Dev-C++] loop optimization
> 
> 
> That is way too slow to use. I use a laptop with a Pentium
> MMX 180 MHz
> CPU, 24MB RAM, 1.5GB HD, and dev-cpp for my old computer.
> Consider
> never using that again.
> 
> ~~Scott Simontis~~
> Programmer
> 
> ----- Original Message -----
> From: David McKen <ci...@ya...>
> Date: Tuesday, August 5, 2003 7:44 pm
> Subject: Re: [Dev-C++] loop optimization
> 
> > Ok here is a test I tried on a OLD comp I have lying
> > around.
> >
> > System specifications:
> > 25Mhz 486 (no math co-processor)
> > 4Mb Ram
> > Compiled using the Pacific C compiler (djgpp runs WAY too
> > slow) using full
> > optimization.
> >
> > Program:
> > #include <stdio.h>
> > #include <time.h>
> >
> > long getint(void);
> >
> > int main()
> > {
> >  time_t begin,end;
> >  long i, get_int;
> >
> >  begin =time(NULL);
> >  for(i =; i < getint(); ++i);
> >  end =time(NULL);
> >  printf("Function call time taken =i\n", end - begin);
> >
> >  get_int =getint();
> >  begin = time(NULL);
> >  for(i =; i < get_int; ++i);
> >  end = time(NULL);
> >  printf("Varible buffer time taken =i\n", end - begin);
> >
> >  return 0;
> > }
> >
> > long getint(void)
> > {
> >  return 50000000;
> > }
> >
> > Output:
> > Function call time taken =0
> > Varible buffer time taken =6
> >
> > Hope this helps.
> >
> > ----- Original Message ----- 
> > From: "OROSZI Balázs" <or...@vp...>
> > To: <dev...@li...>
> > Sent: Tuesday, August 05, 2003 3:17 PM
> > Subject: Re: [Dev-C++] loop optimization
> >
> >
> > > Graham Douglas wrote:
> > > > Run the profiler to find out where the inefficiencies
> > are. In my
> > > > experience, any attempt to prejudge optimisation will
> > be wrong. The
> > > > inefficiencies are _never_ where you expect.
> > > >
> > > > The two fundamental rules for optimising by hand are:
> > > >
> > > > rule 1: don't do it.
> > > > rule 2: don't do it - yet.
> > >
> > > Thanks. Advice taken :)
> > >
> > > --
> > > Greetings,
> > >    Balázs
> > >
> > >
> 
> 
> __________________________________
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> 
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#include <stdio.h>
#include <time.h>

long get_int( void )
{ 
  return 50000000;
}

int main(int argc, char *argv[])
{
  // Time variables.
  time_t start_time, end_time, split_time; 
  long i, getint;
  
  // Initialize clock
  start_time = clock();
 
  for ( i =1; i < get_int(); ++i);
  
  // end time
  end_time = clock();

  //calculate split time
  split_time = end_time - start_time;

  printf( "+-+-+ Function Call time +-+-+\n" );

  // write the time to console
  printf( "Time: %5.3f secs.\n", (double)(split_time)/CLOCKS_PER_SEC );
  
  getint = get_int();  
  
  // Initialize clock
  start_time = clock();
 
  for ( i =1; i < getint; ++i);
  
  // end time
  end_time = clock();

  //calculate split time
  split_time = end_time - start_time;

  // write the time to console
  printf( "+-+-+ Variable Buffer time +-+-+\n" );
  
  printf( "Time: %5.3f secs.\n", (double)(split_time)/CLOCKS_PER_SEC );

  // ... press any key
  printf( "Press ENTER to continue...\n" );
  getchar();

  return 0;
}

output:

+-+-+ Function Call time +-+-+
Time: 0.540 secs.
+-+-+ Variable Buffer time +-+-+
Time: 0.481 secs.
Press ENTER to continue...

compiler:
Mingw version 3.2

GUI:
Dev-C++

Computer:
Pentium III 863MHz 128MM RAM

OS:
Microsoft Windows XP
Profissional
Version 2002
Service Pack 1

=====
+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
Luís Filipe Delgado Brás
Eng.º Civil
Porto - Portugal
email: lf...@ya...
http://www.fotopt.net/autor.asp?autor=2637
+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=

__________________________________
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Re[2]: [Dev-C++] Problem with libjpeg in Dev C++

[Per W. <pw...@ia...>]

Are you compiling a c++ program? The jpeg library is in C. Did you
remember to specify
extern "C" {
#include xxx
}

when including the jpeg include files?

As you can see, the linker doesn't just complain about
missing symbol _jpeg_std_error, but actually knows about what parameter
types the function takes. This is because your source code is trying to
call the jpeg functions in C++ mode, i.e. with name-mangled external
references.

/Per W

> Thanks for your reply!
>
> Your Message: (Sunday, August 03, 2003, 10:51:28 AM)
>
> OB> Dennis M=F6hlmann wrote:
>
> >> Oops,  didn't  know the linker can any other error messages than this =
one (never
> >> received a different error so far...)
> >>
> >> (hope this doesn't get wrapped...)
> >>
> >> g++.exe ../_obj/BlackMagic3D.o ../_obj/world.o ../_obj/entity.o ../_ob=
j/engine.o ../_obj/model.o ../_obj/winmsg.o ../_obj/viewport.o ../_obj/keyb=
oard.o ../_obj/renderer.o ../_obj/image.o  -o
> >> "..\_exe\BlackMagic3D.exe" -L"C:/Programme/Dev-Cpp/lib" -mwindows -lop=
engl32 -lglu32 -lglaux -lwinmm -ljpeg
> >>
> >> ../_obj/image.o(.text+0x68e):image.cpp: undefined reference to `jpeg_s=
td_error(jpeg_error_mgr*)'
> >> ../_obj/image.o(.text+0x6ad):image.cpp: undefined reference to `jpeg_C=
reateDecompress(jpeg_decompress_struct*, int, unsigned)'
> >> ../_obj/image.o(.text+0x6c2):image.cpp: undefined reference to `jpeg_s=
tdio_src(jpeg_decompress_struct*, _iobuf*)'
> >> ../_obj/image.o(.text+0x6d6):image.cpp: undefined reference to `jpeg_r=
ead_header(jpeg_decompress_struct*, int)'
> >> ../_obj/image.o(.text+0x6e8):image.cpp: undefined reference to `jpeg_s=
tart_decompress(jpeg_decompress_struct*)'
> >> ../_obj/image.o(.text+0x7f0):image.cpp: undefined reference to `jpeg_r=
ead_scanlines(jpeg_decompress_struct*, unsigned char**, unsigned)'
> >> ../_obj/image.o(.text+0x828):image.cpp: undefined reference to `jpeg_f=
inish_decompress(jpeg_decompress_struct*)'
> >> ../_obj/image.o(.text+0x83a):image.cpp: undefined reference to `jpeg_d=
estroy_decompress(jpeg_decompress_struct*)'
>
> OB> Well, it sais, it has undefined references of jpeg functions.
> OB> I have no idea though why it has them, as the jpeg library has these
> OB> functions.
> OB> Maybe you should try to recompile the jpeg library from the code.
>
> OB> --
> OB> Greetings,
> OB>    Bal=E1zs
>
> --
> Best regards,
>  Dennis                            mailto:lis...@da...
>
>
>
>
> -------------------------------------------------------
> This SF.Net email sponsored by: Free pre-built ASP.NET sites including
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> Download today and enter to win an XBOX or Visual Studio .NET.
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01
> _______________________________________________
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> Dev...@li...
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> https://lists.sourceforge.net/lists/listinfo/dev-cpp-users
>

Re: AW: [Dev-C++] dev cpp functions

[Per W. <pw...@ia...>]

And possibly you forgot to write:

std::cout
std::endl
std::cin

or

using std::cout;

or

using std;

/Per W

On Wed, 6 Aug 2003, Mathias L=FChr wrote:

> Possibly, you have to include <iosream>.
>
> Mathias
>
> -----Urspr=FCngliche Nachricht-----
> Von: Fr=E9d=E9ric JOLY [mailto:Fre...@fo...]
> Gesendet: Mittwoch, 6. August 2003 09:03
> An: dev...@li...
> Betreff: [Dev-C++] dev cpp functions
>
>
> hello,
>
> i have a problem with i try to compile an example (hello), in DEV-C++
> i have 4 errors cout ,endl and cin : "first use of these function"
> why ?
> could you help me ??
>
>
> fj
>
>
>
>
>

Re: [Dev-C++] loop optimization

[David M. <ci...@ya...>]

I like dos. Anyway I don't use it for everyday tasks. Only
for doing some
long calculation that I don't want to give my main system.

Someone had asked wether it would be better to constantly
re-call a function
in a for loop or t copy the value to a varible and use that
instead.

The idea was to show the code running on an extremly slow
system (with
absolutely no bells and whistles) so a relatively decent
comparison could be
made. Besides, if I did not have this system I would have
to make getint()
return a much bigger number (most comps today go through
50,000,000 too fast
for time() to give a different time reading)

Who messed with my output? It is supposed to be:
Function call time taken = 40
Varible buffer time taken = 16



----- Original Message ----- 
From: "Scott Simontis SIMONTIS" <age...@co...>
To: <ci...@ya...>
Sent: Tuesday, August 05, 2003 7:57 PM
Subject: Re: [Dev-C++] loop optimization


That is way too slow to use. I use a laptop with a Pentium
MMX 180 MHz
CPU, 24MB RAM, 1.5GB HD, and dev-cpp for my old computer.
Consider
never using that again.

~~Scott Simontis~~
Programmer

----- Original Message -----
From: David McKen <ci...@ya...>
Date: Tuesday, August 5, 2003 7:44 pm
Subject: Re: [Dev-C++] loop optimization

> Ok here is a test I tried on a OLD comp I have lying
> around.
>
> System specifications:
> 25Mhz 486 (no math co-processor)
> 4Mb Ram
> Compiled using the Pacific C compiler (djgpp runs WAY too
> slow) using full
> optimization.
>
> Program:
> #include <stdio.h>
> #include <time.h>
>
> long getint(void);
>
> int main()
> {
>  time_t begin,end;
>  long i, get_int;
>
>  begin =time(NULL);
>  for(i =; i < getint(); ++i);
>  end =time(NULL);
>  printf("Function call time taken =i\n", end - begin);
>
>  get_int =getint();
>  begin = time(NULL);
>  for(i =; i < get_int; ++i);
>  end = time(NULL);
>  printf("Varible buffer time taken =i\n", end - begin);
>
>  return 0;
> }
>
> long getint(void)
> {
>  return 50000000;
> }
>
> Output:
> Function call time taken =0
> Varible buffer time taken =6
>
> Hope this helps.
>
> ----- Original Message ----- 
> From: "OROSZI Balázs" <or...@vp...>
> To: <dev...@li...>
> Sent: Tuesday, August 05, 2003 3:17 PM
> Subject: Re: [Dev-C++] loop optimization
>
>
> > Graham Douglas wrote:
> > > Run the profiler to find out where the inefficiencies
> are. In my
> > > experience, any attempt to prejudge optimisation will
> be wrong. The
> > > inefficiencies are _never_ where you expect.
> > >
> > > The two fundamental rules for optimising by hand are:
> > >
> > > rule 1: don't do it.
> > > rule 2: don't do it - yet.
> >
> > Thanks. Advice taken :)
> >
> > --
> > Greetings,
> >    Balázs
> >
> >


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Re: [Dev-C++] Bug - Profiling [was: Profiling a proyect, how?]

[<ri...@te...>]

Luigi Santillo escribió:
  > Hello Ricardo,
> 
> you have not specified which version of Dev-C++ your are using,  
> neither you tell about which profiling program you wish to use;
> I will assume Dev-C++ 4.9.8.1 and gprof shipped with MinGW Gcc 3.2. 

Good assumption ;)

> I tried myself to profile an application (using 4.9.8.1) and have 
> come to the conclusion that there is a bug in the options Dev-C++ 
> adds to the linker when you enable profiling. In fact, while it 
> does correctly pass the "-pg" option to the compiler, it does not 
> do so when linking, instead it passes the option "-lmon" (which 
> should mean: link against "libmon.a"), that seems useless here.

Ok, well, I´m so still wondering why didn´t I take a look at the 
Compiler log. :(
Just installed Dev-cpp 4.9.8.0 -got some problems when making a SDL 
1.2.5 devpack, although finally it works! Dev-Cpp v4.9.8.0 DOES paas the 
-pg option to the linker. Actually profiling works flawless.
But as you state, in 4.9.8.1 does not, so I also think it´s a bug.

> Until the bug is fixed, a way to achieve profiling could be:
>  - avoid enabling the linker flags for profiling (so you won't have
>    the "-lmon" added to the linker flags)
>  - go to "Project"->"Project Options": "Parameters" tab and manually
>    add "-pg" to the linker flags
> then, as usual, compile your application, run it (just one is enough
> to create "gmon.out") and finally use "Execute->profile analysis".

That was the same workaround I used, but I wanted to know if I was doing 
something wrong :)

> If you need more information about profiling (with gprof), I suggest 
> reading the material found at the link:
> 
>   www.delorie.com/gnu/docs/binutils/gprof_toc.html

Thanks for the link and help.
Regards.

-- 
---------------------------------------------------
      Ricardo Amores Hernández
	ICQ: 19463735
	MSN: zheo_ (at) hotmail (dot) es
---------------------------------------------------

AW: [Dev-C++] dev cpp functions

[<lu...@iv...>]

Possibly, you have to include <iosream>.
=20
Mathias

-----Urspr=FCngliche Nachricht-----
Von: Fr=E9d=E9ric JOLY [mailto:Fre...@fo...]
Gesendet: Mittwoch, 6. August 2003 09:03
An: dev...@li...
Betreff: [Dev-C++] dev cpp functions


hello,
=20
i have a problem with i try to compile an example (hello), in DEV-C++
i have 4 errors cout ,endl and cin : "first use of these function"
why ?
could you help me ??
=20
=20
fj


=20

[Dev-C++] dev cpp functions

[<Fre...@fo...>]

hello,

i have a problem with i try to compile an example (hello), in DEV-C++
i have 4 errors cout ,endl and cin : "first use of these function"
why ?
could you help me ??


fj

[Dev-C++] Bug - Profiling [was: Profiling a proyect, how?]

[Luigi S. <gi...@li...>]

On Sat, Aug 02, 2003 at 05:31:44PM +0200, Ricardo Amores Hern?ndez wrote:
> Hi
> How can i use the profiler in Dev C++ ? I check the correct linker 
> options ('generate debug information' and 'generate profiling 
> information' too) both in the proyect options and compiler options (just 
> to make sure ;)
> But after building successfully my app I get the following messege when 
> I choose "Profiler Analysis" from Compile Menu:
> "Please run the proyect at least once so that profiling info is 
> generated..."
> 
> And yes, I´ve run my proyect not once but n-times and i still get the error.
> [...]

Hello Ricardo,

you have not specified which version of Dev-C++ your are using,  
neither you tell about which profiling program you wish to use;
I will assume Dev-C++ 4.9.8.1 and gprof shipped with MinGW Gcc 3.2. 

I tried myself to profile an application (using 4.9.8.1) and have 
come to the conclusion that there is a bug in the options Dev-C++ 
adds to the linker when you enable profiling. In fact, while it 
does correctly pass the "-pg" option to the compiler, it does not 
do so when linking, instead it passes the option "-lmon" (which 
should mean: link against "libmon.a"), that seems useless here.

Now, when you run the executable generated by Dev-C++, the call
graph profile file ("gmon.out") is not created. This, I think, is 
the reason why Dev-C++ keeps asking you to run your application over
and over again, as you try to profile it.

Until the bug is fixed, a way to achieve profiling could be:
 - avoid enabling the linker flags for profiling (so you won't have
   the "-lmon" added to the linker flags)
 - go to "Project"->"Project Options": "Parameters" tab and manually
   add "-pg" to the linker flags

then, as usual, compile your application, run it (just one is enough
to create "gmon.out") and finally use "Execute->profile analysis".

If you need more information about profiling (with gprof), I suggest 
reading the material found at the link:

  www.delorie.com/gnu/docs/binutils/gprof_toc.html

Regards
-- 
>> gisan >>

P.S. I don't remember if there is a specif address for bug reports, 
     I hope the list will let me know it, so that I can forward this 
     message; in the meanwhile, I hope the authors of Dev-C++ monitor 
     this list.

RE: [Dev-C++] General Compiler ???

[Michael D. S. <for...@hi...>]

I've been using Dev-C++ for a few days. I've written one program. I managed 
to translate an old PERL program after changing it considerably because of 
the stuff that's easy in PERL and almost impossible in C++  --  @array = 
<FH>; for instance. Now I know why Larry Wall sometimes calls it "magic" :)

I used the GUI on DEV -- The Compile -- Execute buttons.

The program is simple and (probably:) ANSI so it was suggested I use gcc to 
keep from having to compile a UNIX and Window's version. If it's ANSI what 
difference does the compiler make?

Which compiler am I using when I use the GUI on DEV?  (The Compile -- 
Execute buttons)

Attempting to use gcc, I opened a DOS window (command line) and working 
from within the
C:\Dev-C++\ bin directory for the moment to make things easier, I tried to 
compile the source using gcc. It can't find the header files fstream.h and 
string but it seemed to like stdlib OK. I copied them into the same 
directory. Still can't find them. I thought it always searched the current 
directory?

Does gcc have a problem with some header files?

Once again, any thoughts, discussions to clear the fog a little will be 
appreciated.

ms

Half the people you know are below average
99% of lawyers give the rest a bad name
42.7% of all statistics are made up on the spot

Re: [Dev-C++] loop optimization

[David M. <ci...@ya...>]

Ok here is a test I tried on a OLD comp I have lying
around.

System specifications:
25Mhz 486 (no math co-processor)
4Mb Ram
Compiled using the Pacific C compiler (djgpp runs WAY too
slow) using full
optimization.

Program:
#include <stdio.h>
#include <time.h>

long getint(void);

int main()
{
  time_t begin,end;
  long i, get_int;

  begin = time(NULL);
  for(i = 0; i < getint(); ++i);
  end = time(NULL);
  printf("Function call time taken = %i\n", end - begin);

  get_int = getint();
  begin = time(NULL);
  for(i = 0; i < get_int; ++i);
  end = time(NULL);
  printf("Varible buffer time taken = %i\n", end - begin);

  return 0;
}

long getint(void)
{
  return 50000000;
}

Output:
Function call time taken = 40
Varible buffer time taken = 16

Hope this helps.

----- Original Message ----- 
From: "OROSZI Balázs" <or...@vp...>
To: <dev...@li...>
Sent: Tuesday, August 05, 2003 3:17 PM
Subject: Re: [Dev-C++] loop optimization


> Graham Douglas wrote:
> > Run the profiler to find out where the inefficiencies
are. In my
> > experience, any attempt to prejudge optimisation will
be wrong. The
> > inefficiencies are _never_ where you expect.
> >
> > The two fundamental rules for optimising by hand are:
> >
> > rule 1: don't do it.
> > rule 2: don't do it - yet.
>
> Thanks. Advice taken :)
>
> --
> Greetings,
>    Balázs
>
>
>
> -------------------------------------------------------
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RE: [Dev-C++] Thanks and Another question (windows/linux)

[lamont n. <lam...@ve...>]

I would also suggest picking up a book on the subject. The one that I
have is: Win32 Multithreaded Programming,
http://www.amazon.com/exec/obidos/tg/detail/-/1565922964/qid=1060125344/
sr=1-1/ref=sr_1_1/103-2948163-7295023?v=glance&s=books


-------------------------
Hello
 
Thank you again for answering my question even the strangest ones  :)
 
Anyway, I am almost giving up in this compilation thing and thinking of
going back to my old linux machine with the nice g++. It seems that the
system (ARIA) works only for visual C++ 6.0 if in windows. So I tried to
cheat the compiler into making it think we were in linux to see what
happens. Then it said that several files are missing.
 
Is Multithread supported by Dev C++?? Where are the multithread
libraries??
-------------------------

Re: [Dev-C++] Thanks and Another question (windows/linux)

[lamont n. <lam...@ve...>]

The C++ standard does not address the issue of multi-threading.
Therefore you would have to use an API which is most likely supplied by
your operating system. If you are using windows try looking here to
start:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dndllpr
o/html/msdn_threads.asp

Then find the API reference for the functions mentioned in that article.
The same thing applies with UNIX except the API would be different. 

-------------------------
Hello
 
Thank you again for answering my question even the strangest ones  :)
 
Anyway, I am almost giving up in this compilation thing and thinking of
going back to my old linux machine with the nice g++. It seems that the
system (ARIA) works only for visual C++ 6.0 if in windows. So I tried to
cheat the compiler into making it think we were in linux to see what
happens. Then it said that several files are missing.
 
Is Multithread supported by Dev C++?? Where are the multithread
libraries??
-------------------------

Re: [Dev-C++] How do I store HUGE numbers.

[David M. <ci...@ya...>]

Talking bigger than long int.

I am doing some math processing and would like either some
example code or a
library. Together with a int (or some other data type for
the exponent) it
will also give me a very high precision floating point data
type.

----- Original Message ----- 
From: "Scott Simontis SIMONTIS" <age...@co...>
To: <ci...@ya...>
Sent: Tuesday, August 05, 2003 1:46 PM
Subject: Re: [Dev-C++] How do I store HUGE numbers.


> long int is my way.
>
> ~~Scott Simontis~~
> Programmer
>
> ----- Original Message -----
> From: David McKen <ci...@ya...>
> Date: Tuesday, August 5, 2003 1:06 pm
> Subject: [Dev-C++] How do I store HUGE numbers.
>
> > OK boy and girls.
> >
> > Other than allocating a block of memory and
interpreting
> > each of the bits myself how can I store really big
numbers
> > (Let's stick with integers for now) in memory.
> >
> > Signed
> > David Mcken
> >
> > P.S. Also for any of you looking for job security.
> > http://mindprod.com/unmain.html - How To Write
> > Unmaintainable Code
> >
> > __________________________________
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software
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> >
> >
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> >
>
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> >
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Re: [Dev-C++] Thanks and Another question (windows/linux)

[David M. <ci...@ya...>]

----- Original Message ----- 
From: "OROSZI Balázs" <or...@vp...>
To: <dev...@li...>
Sent: Tuesday, August 05, 2003 6:45 AM
Subject: Re: [Dev-C++] Thanks and Another question
(windows/linux)


> Pukara Rob wrote:
> > Anyway, I am almost giving up in this compilation thing
and thinking of
> > going back to my old linux machine with the nice g++.
It seems that the
> > system (ARIA) works only for visual C++ 6.0 if in
windows. So I tried to
> > cheat the compiler into making it think we were in
linux to see what
> > happens. Then it said that several files are missing.
>
> What exactly are the errors you get, if you use the
system as intended
> (I mean for Windows). Why do you think it only works with
VC++? What are
> the errors?
>
> > Is Multithread supported by Dev C++?? Where are the
multithread
libraries??
>
> I don't know about this one.

Compiler flag -mthread (if that one does not work try
-mthreads)
>
>
> > By the way what "import function of dev"?
>
> It is in File->Import, which allows you to import
(convert) VC++ 6
> project files to Dev-C++ ones. Although, most of the
time, you still
> need to clean up the result, but it does most of the work
for you.
>
> --
> Greetings,
>    Balázs


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Re: [Dev-C++] loop optimization

[<or...@vp...>]

Graham Douglas wrote:
> Run the profiler to find out where the inefficiencies are. In my 
> experience, any attempt to prejudge optimisation will be wrong. The 
> inefficiencies are _never_ where you expect.
> 
> The two fundamental rules for optimising by hand are:
> 
> rule 1: don't do it.
> rule 2: don't do it - yet.

Thanks. Advice taken :)

--
Greetings,
   Balázs

Re: [Dev-C++] help needed for #include

[<or...@vp...>]

Avik Ghose wrote:
> thanks a lot!

You should read the second answer too, as it was more precise.

--
Greetings,
   Balázs

RE: [Dev-C++] How do I store HUGE numbers.

[Ioannis V. <iv...@em...>]

> -----Original Message-----
> From: dev...@li... 
> [mailto:dev...@li...] On Behalf 
> Of David McKen
> Sent: Tuesday, August 05, 2003 8:06 PM
> To: Dev-C++ Users Mailing List
> Subject: [Dev-C++] How do I store HUGE numbers.
> 
> 
> OK boy and girls.
> 
> Other than allocating a block of memory and interpreting
> each of the bits myself how can I store really big numbers
> (Let's stick with integers for now) in memory.


In C++ it is easy, you can create a beautiful class, with defined
operator<<(const ostream &, const yout_class &), operator int() etc. In C
you will have to make a struct with accompanying access functions.



> Signed
> David Mcken
> 
> P.S. Also for any of you looking for job security.
> http://mindprod.com/unmain.html - How To Write
> Unmaintainable Code


Hehe, the above is cool.






Ioannis Vranos
 
* Programming pages: http://www.noicys.freeurl.com
* Alternative URL 1: http://run.to/noicys
* Alternative URL 2: http://www.noicys.cjb.net

Re: [Dev-C++] loop optimization

[Graham D. <g.d...@nt...>]

Run the profiler to find out where the inefficiencies are. In my 
experience, any attempt to prejudge optimisation will be wrong. The 
inefficiencies are _never_ where you expect.

The two fundamental rules for optimising by hand are:

rule 1: don't do it.
rule 2: don't do it - yet.




OROSZI Balázs wrote:

> Hi!
>
> Now, I have a question.
> I need to do heavy optimizations in the project I am working on, and I 
> am asking you, whether will I gain any speedup by optimizing loops. I 
> am interested in the for loop exactly. Let's take this example:
>
> for(i=0;i<getint();i++){
> /* ... */
> }
>
> Would it worth it to take that getint() into an outer variable, and 
> only use that in the conditional, like this:
>
> int c = getint();
> for(i=0;i<c;i++){
> /* ... */
> }
>
> Will this give me any speedup? I am interested in particular, is for 
> going to call getint() EVERY time in the first case (on top), or will 
> it do it only once? I think the second case is better, am I right?
>
> Allright, that was my first question, here is the second:
> What is the case, if the conditional is a KNOWN value. Something, like 
> a macro. Here is the example:
>
> #define GETINT (10*5)
>
> for(i=0;i<GETINT;i++){
> /* ... */
> }
>
> I suppose, this will be optimised by the compiler, and this can even 
> be unrolled, am I right?
>
> Thanks in advance.
> -- 
> Greetings,
>   Balázs
>
>
>
> -------------------------------------------------------
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Re: [Dev-C++] help needed for #include

[Graham D. <g.d...@nt...>]

 From the standard, section 16.2

   1. A #include directive shall identify a header or source file that
      can be processed by the implementation.
   2. A preprocessing directive of the form        # include
      <hcharsequence> newline      searches a sequence of implementation
      defined places for a header identified uniquely by the
      specifiedsequence between the < and > delimiters, and causes the
      replacement of that directive by the entire contentsof the header.
      How the places are specified or the header identified is
      implementation defined.
   3. A preprocessing directive of the form      # include
      "qcharsequence" newline     causes the replacement of that
      directive by the entire contents of the source file identified by
      the specified sequence between the " delimiters. The named source
      file is searched for in an implementationdefined manner. If this
      search is not supported, or if the search fails, the directive is
      reprocessed as if it read      # include <hcharsequence> newline  
         with the identical contained sequence (including > characters,
      if any) from the original directive.

In other words, the <> form looks in system-specified places, whereas 
the "" form looks in a (possibly) different set of system specified 
places then, if that doesn't locate the file, it looks in the same 
places as <> would have looked.

In practical terms, <> looks in the system include directory, whereas "" 
looks in the directory containing the file being compiled, _then_ looks 
in the system include directory.


Avik Ghose wrote:

> Hi all,
> I have this slight confusion regarding how the two are different.
> #include <foo.h>
> #include "foo.h"
> I mean how does GNU make and gcc differentiate while searching for the 
> include file in both the cases.
> Thanks in advance.
> Have a nice day!
>  
>
>
> Thanx and Regards
> Avik Ghose
>
> *SMS* <http://in.mobile.yahoo.com/new/pc/> using the Yahoo! 
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