Re: [Dev-C++] linking .h file and .cpp file

[Vlada D. <dj...@im...>]

----- Original Message -----
From: "Manish Shrivastava" <msh...@qu...>
To: "Vlada Djurovic" <dj...@im...>; "casper"
<oz...@op...>; <dev...@li...>
Sent: Friday, May 21, 2004 12:31 PM
Subject: RE: [Dev-C++] linking .h file and .cpp file


> Is it a standard that all declarations shud go into .h and implementations
> in .cpp (or just a convention). Though I see that most compiler doesn't
> allow to compile .h and even if they do, they give a linking error for
> main() (even if it is present in .h)
>
> Manish

Well, I don't know if it's a standard. I don't really have much experience,
but I've seen in many places that this is the recomended way to do things. I
think it represents the separation of interface( declaration) from
implementation (definitions), which is much talked about in OOP books. You
could also put both declarations and definitions in one file, but it reduces
readability, reusability, and probably some other problems.
Anyway, somebody with more experience will probably explain this better than
me. :-)

> -----Original Message-----
> From: dev...@li...
> [mailto:dev...@li...] On Behalf Of Vlada
> Djurovic
> Sent: Friday, May 21, 2004 3:46 PM
> To: casper; dev...@li...
> Subject: Re: [Dev-C++] linking .h file and .cpp file
>
>
> ----- Original Message -----
> From: "casper" <oz...@op...>
> To: <dev...@li...>
> Sent: Friday, May 21, 2004 11:15 AM
> Subject: [Dev-C++] linking .h file and .cpp file
>
>
> > Hi,
> >
> >            I have a file with .h extension which includes my main
program.
> I
> > have put
> >
> > #include "logfuncion.cpp"
> >
> >            In the .h extension file. And inside the .cpp file I have put
> the
> > function definitions.
> >
> > Both files are in the same directory, but the .h file failed to compile
> > because of the error
> >
> > Undefined "logfuncion.cpp"
> >
> >            How could I solve the problem?
> >
> >            Thanks in advance.
> >
> It should be the other way around. Your function declarations should go in
> .h file, and their definitions in .cpp.
> For example:
> ---myheader.h---
> class Myclass{
>     public void f();
>     public int g(int x);
> }
> --end of myheader.h---
> And in mymain.cpp you should do:
>
> ----mymain.cpp------
> #include <myheader.h>
> void Myclass::f(){
>    //define function
> }
> int Myclass::g(int x){
>    //define function
> }
> ----end mymain.cpp----
>
>
>
> -------------------------------------------------------