Thread: [Dev-C++] Bug in dev-c++ header files

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Hi...

Try to compile the following code using Dev-C++ 4.9.8.0.

#include <fstream.h>
int main()
{}

You will receive error!!!!!

Mohammed

And in what way is this a bug in the MingW (NOT Dev-C++, Dev-C++ is
_NOT_ a compiler, only an IDE) headers?
The C++ standard library files are extensionless, using the .h variant
is deprecated. The compiler should tell you this, as a warning, not an
error. The proper way to write what you had is:

#include <fstream>  // Note, NO extension

int main()
{
	// do something with the facilities provided by fstream, for
instance:
	std::ofstream out("blah.txt");
	out << "Howdy" << endl;

	return 0;
}

-----Original Message-----
From: dev...@li...
[mailto:dev...@li...] On Behalf Of Mohamed
Iqbal
Sent: Wednesday, August 27, 2003 8:35 PM
To: Dev-Cpp-Users
Subject: [Dev-C++] Bug in dev-c++ header files

Hi...

Try to compile the following code using Dev-C++ 4.9.8.0.

#include <fstream.h>
int main()
{}

You will receive error!!!!!

Mohammed

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Mohamed Iqbal wrote:
> Hi...
> 
> Try to compile the following code using Dev-C++ 4.9.8.0.
> 
> #include <fstream.h>
> int main()
> {}
> 
> You will receive error!!!!!

under 4.9.8.1 I don't see any error (only one warning)

Hi! 

Sorry to say this, but the problem is not with the
header, but with your program : such a syntax doesn't
comply with ansi c++ anymore. 
I'm not a c++ guru, but I think you should write
something like : 

#include <fstream>
using namespace std;
int main()
{}

Simply removing the ".h" from the #include works. 

By the way, I'm new to the list, so Hi! Everyone... 

Sandy/Moonlight

 --- Mohamed Iqbal <ia...@jo...> a écrit : 
> Hi...
> 
> Try to compile the following code using Dev-C++
> 4.9.8.0.
> 
> #include <fstream.h>
> int main()
> {}
> 
> You will receive error!!!!!
> 
> Mohammed
> 
> 

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Dev-Cpp 4.9.8.x, if I'm not wrong uses MinGW 2.0.0, based on GCC 3.0 
(I'm not sure because I have the editor and the compiler downloaded 
separately). In it fstream.h and any c++ header with extension is 
considered obsolete, so it is in ./include/c++/3.2/backward; which is a 
directory which seems to not be in the default search path, so you have 
to add it with the -I compiler option and, if you don't pass the 
-Wnodeprecated option it will warn about the use of a deprecated header. 
You should use the headers without extension, but don't forget they use 
namespaces, so you'll have to either add the line using namespace std; 
before your code (which breaks the object of namespace), or various 
lines saying using std::whatever in that namespace you use, e.g., 
std::cout, std::endl, etc so you can type simply cout or endl, etc, or 
you'll have to qualify all those standard functions and variables and 
classes with the std:: prefix, saying std::cout <<, std::cin >>, 
std::endl, etc.

Mohamed Iqbal wrote:

>Hi...
>
>Try to compile the following code using Dev-C++ 4.9.8.0.
>
>#include <fstream.h>
>int main()
>{}
>
>You will receive error!!!!!
>
>Mohammed
>
>
>
>
>-------------------------------------------------------
>This sf.net email is sponsored by:ThinkGeek
>Welcome to geek heaven.
>http://thinkgeek.com/sf
>_______________________________________________
>Dev-cpp-users mailing list
>Dev...@li...
>TO UNSUBSCRIBE: http://www23.brinkster.com/noicys/devcpp/ub.htm
>https://lists.sourceforge.net/lists/listinfo/dev-cpp-users
>
>  
>

Sorry for posting this. In fact, I know that DEV-C++ is just and IDE (I
guess more than this) to the MingW compiler. I know also that the header
files come with the compiler. This is a typo I made because I was hurry and
tired.

All my applications are written in Standard C++. I don't use the old C
header files unless it is needed.

The problem arises from a simple application I wrote ten years ago using
Borland C++. I tried to compile it using more than one compiler and all
produced no error and no warning. But on Dev-C++ I received an error message
from the compiler.

Mohammed

Then you could interpret this in two ways....

1) MingW or GCC has a bug in one of its header files
2) All the other compilers accept non-standard code, where GCC is pretty
strict about this.

And I'm pretty sure it's the second... fstream.h is non-standard, no
matter how you look at it.

If you could tell us what error you get, it'd help things along a lot. A
full compile log would be even better (all of the text you see in the
"Compile Log" tab).

I think it's this 'error' (warning) you get:

warning: #warning This file includes at least one deprecated or
antiquated header. Please consider using one of the 32 headers found in
section 17.4.1.2 of the C++ standard. Examples include substituting the
<X> header for the <X.h> header for C++ includes, or <sstream> instead
of the deprecated header <strstream.h>. To disable this warning use
-Wno-deprecated.

And this warning in itself indicates exactly what the problem is.

Paul

-----Original Message-----
From: dev...@li...
[mailto:dev...@li...] On Behalf Of Mohamed
Iqbal
Sent: Thursday, August 28, 2003 11:26 PM
To: Dev-Cpp-Users
Subject: Re: [Dev-C++] Bug in dev-c++ header files

Sorry for posting this. In fact, I know that DEV-C++ is just and IDE (I
guess more than this) to the MingW compiler. I know also that the header
files come with the compiler. This is a typo I made because I was hurry
and tired.

All my applications are written in Standard C++. I don't use the old C
header files unless it is needed.

The problem arises from a simple application I wrote ten years ago using
Borland C++. I tried to compile it using more than one compiler and all
produced no error and no warning. But on Dev-C++ I received an error
message from the compiler.

Mohammed

-------------------------------------------------------
This sf.net email is sponsored by:ThinkGeek
Welcome to geek heaven.
http://thinkgeek.com/sf _______________________________________________
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> -----Original Message-----
> From: dev...@li... 
> [mailto:dev...@li...] On Behalf 
> Of Mohamed Iqbal
> Sent: Friday, August 29, 2003 12:26 AM
> To: Dev-Cpp-Users
> Subject: Re: [Dev-C++] Bug in dev-c++ header files
> 
> 
> Sorry for posting this. In fact, I know that DEV-C++ is just 
> and IDE (I
> guess more than this) to the MingW compiler. I know also that 
> the header
> files come with the compiler. This is a typo I made because I 
> was hurry and
> tired.
> 
> All my applications are written in Standard C++. I don't use the old C
> header files unless it is needed.
> 
> The problem arises from a simple application I wrote ten 
> years ago using
> Borland C++. I tried to compile it using more than one 
> compiler and all
> produced no error and no warning. But on Dev-C++ I received 
> an error message
> from the compiler.

So as expected, non standard compliant code can't be considered portable.

Ioannis Vranos

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Thread: [Dev-C++] Bug in dev-c++ header files

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