C++Talk.NET C++ language newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  C++ Scope          C++Talk.NET Forum Index -> C++ language (comp.lang.c++) View previous topic :: View next topic   Author Message Jonathan Clements Guest Posted: Sun Jun 29, 2003 6:26 pm    Post subject: C++ Scope Hi all, Does 'for' have it's own scope? In one compiler I'm quite happy writing:- for(unsigned long i=1; i <= WHATEVER; i++) { /* something here */ } and then (not nested) for(unsigned long i=1; i <= WHATEVER2; i++) { /* something here2 */ } Probably bad practice, but as far as I understand C++, 'i' should be a temp within the scope of the for loop. Some compilers allow this, others don't.... I'm wondering if I'm mis-understanding the scope rules or the compilers are. Thanks, Jon. Back to top Kurt Krueckeberg Guest Posted: Sun Jun 29, 2003 6:30 pm    Post subject: Re: C++ Scope Quote: Hi all, Does 'for' have it's own scope? In one compiler I'm quite happy writing:- for(unsigned long i=1; i <= WHATEVER; i++) { /* something here */ } and then (not nested) for(unsigned long i=1; i <= WHATEVER2; i++) { /* something here2 */ } Probably bad practice, but as far as I understand C++, 'i' should be a temp within the scope of the for loop. Some compilers allow this, others don't.... I'm wondering if I'm mis-understanding the scope rules or the compilers are. Your code is correct, even if some compilers incorrectly complain. Back to top Stuart Golodetz Guest Posted: Sun Jun 29, 2003 8:08 pm    Post subject: Re: C++ Scope "Jonathan Clements" <jonathan (AT) psilocybe (DOT) demon.co.uk> wrote Quote: Hi all, Does 'for' have it's own scope? In one compiler I'm quite happy writing:- for(unsigned long i=1; i <= WHATEVER; i++) { /* something here */ } and then (not nested) for(unsigned long i=1; i <= WHATEVER2; i++) { /* something here2 */ } Probably bad practice, but as far as I understand C++, 'i' should be a temp within the scope of the for loop. Some compilers allow this, others don't.... I'm wondering if I'm mis-understanding the scope rules or the compilers are. The compilers are. It's perfectly good (and common) practice to reuse loop variables like i. If one of your compilers doesn't like it, just put: #define for if(0); else for at the top of each translation unit and it'll fix it. HTH, Stuart. Quote: Thanks, Jon. Back to top Jonathan Clements Guest Posted: Sun Jun 29, 2003 8:30 pm    Post subject: Re: C++ Scope Thank you to Kurt K., John H., and Stuart G. for your replies... "Jonathan Clements" <jonathan (AT) psilocybe (DOT) demon.co.uk> wrote Quote: Hi all, Does 'for' have it's own scope? In one compiler I'm quite happy writing:- for(unsigned long i=1; i <= WHATEVER; i++) { /* something here */ } and then (not nested) for(unsigned long i=1; i <= WHATEVER2; i++) { /* something here2 */ } Probably bad practice, but as far as I understand C++, 'i' should be a temp within the scope of the for loop. Some compilers allow this, others don't.... I'm wondering if I'm mis-understanding the scope rules or the compilers are. Thanks, Jon. Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         C++Talk.NET Forum Index -> C++ language (comp.lang.c++) All times are GMT Page 1 of 1   Jump to: Select a forum C/C++----------------C LanguageC Language (Moderated)C++ Language (Moderated)C++ language (comp.lang.c++)C++ language, library and standards Non-English C/C++ Newsgroups----------------C++ (German)C++ (French)  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.