From:	Bill Currie <bcurrie AT tssc DOT co DOT nz>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: C++ and globals ??
Date:	Tue, 02 Dec 1997 11:03:21 +1300
Organization:	Telecommunication Systems Support Centre
Lines:	40
Message-ID:	<34833429.3D1D@tssc.co.nz>
References:	<34832B11 DOT 7408 AT netunlimited DOT net>
NNTP-Posting-Host:	node106.tssc.co.nz
Mime-Version:	1.0
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

gilley wrote:
>  //globals
>  FONT *myfont;
>  FONT *systemfont;
> 
>  class MyClass
>  {
>     Font *myfont;
>     void afunction(void);
> 
>  };
>  void MyClass::afunction(void)
>  {
>     systemfont=myfont;
>  };
> 
>   OK now the question is.. in afunction()
>   is the systemfont now poining to MyClass.myfont
>   or is it pointing to the global myfont?
> 
>   How do I distinguish the two? Should I say
>   This.myfont to be sure I am getting the myfont
>   var in the class?
> 
>                  Thanks all,
>    I know its a dumb question. :)
Not dumb, just... dunno. Wrong group, anyway.

Anyway, systemfont points to MyClass::myfont. Use scoping rules, member
variables are in the scope of member functions.  To get at the global
myfont from a MyClass member function, use `::'. ie

 void MyClass::afunction(void)
 {
    systemfont=::myfont;
 };

Bill
-- 
Leave others their otherness

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