Re: [Dev-C++] Where to include files

[Matthews <dem...@uw...>]

Guard statements are lines like these in your header files:

#ifndef FOOHEADER_H
#define FOOHEADER_H

int foo;
char *foostring;
//...

#endif

Then if two files include foo.h, it won't be recompiled because FOOHEADER_H
has already been defined.

At 04:12 PM 11/10/2003 -0700, David McKen wrote:
>Explain.
>
>----- Original Message ----- 
>From: <age...@co...>
>To: <ci...@ya...>
>Sent: Saturday, October 11, 2003 12:12 PM
>Subject: Re: [Dev-C++] Where to include files
>
>
>> Guard statements can prevent this.
>> 
>> --
>> ~~Scott Simontis~~
>> Programmer
>> > As far as  I know there are no "rules". However here is my rule
>> > "Include in
>> > the .cpp, if it gives you errors put it in the .h".
>> > 
>> > The main reason you don't want to put it in the .h is because the
>> > header
>> > will be included in EVERY single file that includes your header
>and
>> > (this is
>> > the killer) is recompiled every time one of those files is
>> > re-compiled. If
>> > the header is in the .cpp then it is only re-compiled when the
>.cpp
>> > changes.
>> > 
>> > Of course if you have some super computer avalible then this
>reason
>> > goes out
>> > the window. If you don't then this is about the only reason I can
>> > think of.
>> > 
>> > Signed
>> > David McKen
>> > 
>> > 
>> > ----- Original Message ----- 
>> > From: "Glen Vermeylen" <gve...@pa...>
>> > To: <dev...@li...>
>> > Sent: Saturday, October 11, 2003 10:32 AM
>> > Subject: [Dev-C++] Where to include files
>> > 
>> > 
>> > > Hi, I was wondering where I should best place my include files.
>> > > Suppose I have a class testClass which needs to include a
>couple of
>> > files.
>> > > Should I place the include-statements in the .cpp files or in
>the
>> > .h (so
>> > > one could see which files are needed?)?
>> > > Or does it depend on the circomstances? For example:
>include-files
>> > which
>> > > contain the type of declared members in the header, and
>> > include-files
>> > > needed for the implementation in the .cpp file?
>> > > Are there rules, or am I free to choose?
>> > >
>> > > Please enlighten me :-) .
>> > >
>> > >
>> > >
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