Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
| From | August Karlstrom <fusionfile@gmail.com> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: Irritating multiple redefinition problem -- please help |
| Date | 2015-09-14 14:39 +0200 |
| Organization | Aioe.org NNTP Server |
| Message-ID | <mt6f5q$ftr$1@speranza.aioe.org> (permalink) |
| References | <d26a19b9-2aa7-451d-9df4-14ece63ad4a2@googlegroups.com> <d5mufiF884kU11@mid.individual.net> <mt6046$slc$1@dont-email.me> |
On 2015-09-14 10:24, David Brown wrote: > On 14/09/15 05:50, Ian Collins wrote: >> Make the declaration in the header >> >> extern const double PI2; >> >> and define in in one and only one .c file >> >> const double PI2 = 6.28; >> > > Alternatively, especially for simple constants, change the declaration > in the header file to the definition : > > static const double PI2 = 6.28; > > and remove any definition in .c files. > > (There are differences in these two techniques, but in cases like yours > then either can usually be used. Using a static const in the header > will often lead to more efficient code, if that is relevant to you.) Why not simply #define PI2 6.28 ? -- August
Back to comp.lang.c | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
Irritating multiple redefinition problem -- please help dakupoto@gmail.com - 2015-09-13 20:39 -0700
Re: Irritating multiple redefinition problem -- please help Ian Collins <ian-news@hotmail.com> - 2015-09-14 15:50 +1200
Re: Irritating multiple redefinition problem -- please help David Brown <david.brown@hesbynett.no> - 2015-09-14 10:24 +0200
Re: Irritating multiple redefinition problem -- please help August Karlstrom <fusionfile@gmail.com> - 2015-09-14 14:39 +0200
Re: Irritating multiple redefinition problem -- please help David Brown <david.brown@hesbynett.no> - 2015-09-14 15:45 +0200
Re: Irritating multiple redefinition problem -- please help Richard Heathfield <rjh@cpax.org.uk> - 2015-09-14 14:52 +0100
Re: Irritating multiple redefinition problem -- please help August Karlstrom <fusionfile@gmail.com> - 2015-09-14 18:13 +0200
Re: Irritating multiple redefinition problem -- please help Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-09-14 16:41 +0100
Re: Irritating multiple redefinition problem -- please help dakupoto@gmail.com - 2015-09-14 19:47 -0700
Re: Irritating multiple redefinition problem -- please help Paul N <gw7rib@aol.com> - 2015-09-15 16:00 -0700
Re: Irritating multiple redefinition problem -- please help gordonb.78i5t@burditt.org (Gordon Burditt) - 2015-09-13 23:40 -0500
Re: Irritating multiple redefinition problem -- please help Ike Naar <ike@iceland.freeshell.org> - 2015-09-20 20:24 +0000
csiph-web