C++Talk.NET C++ language newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  initializing a const array in a class          C++Talk.NET Forum Index -> C++ language (comp.lang.c++) View previous topic :: View next topic   Author Message J. Campbell Guest Posted: Wed Jan 28, 2004 3:29 pm    Post subject: initializing a const array in a class I have a class that I want to contain a const data-member equivalent to eg: int array[8] = {7,11,13,17,19,23,29,31}; What's the simplest way to create such a table inside a class? Thanks, Joe Back to top Gianni Mariani Guest Posted: Wed Jan 28, 2004 3:57 pm    Post subject: Re: initializing a const array in a class J. Campbell wrote: Quote: I have a class that I want to contain a const data-member equivalent to eg: int array[8] = {7,11,13,17,19,23,29,31}; What's the simplest way to create such a table inside a class? Thanks, Joe How about this ? const int array[8] = {7,11,13,17,19,23,29,31}; struct foo { const int (&m_array)[8]; foo() : m_array( array ) { } }; Back to top Joe C Guest Posted: Wed Jan 28, 2004 7:34 pm    Post subject: Re: initializing a const array in a class "Gianni Mariani" <gi2nospam (AT) mariani (DOT) ws> wrote Quote: J. Campbell wrote: I have a class that I want to contain a const data-member equivalent to eg: int array[8] = {7,11,13,17,19,23,29,31}; What's the simplest way to create such a table inside a class? Thanks, Joe How about this ? const int array[8] = {7,11,13,17,19,23,29,31}; struct foo { const int (&m_array)[8]; foo() : m_array( array ) { } }; Gianni, Thanks. This works;-) I'm a little confused by the syntax. What exactly does: const int (&m_array)[8] mean? and how does it differ from a: const int* to the head of an array? Thanks for your help/solution. Joe Back to top S. Richards Guest Posted: Wed Jan 28, 2004 10:08 pm    Post subject: Re: initializing a const array in a class [email]mango_maniac (AT) yahoo (DOT) com[/email] (J. Campbell) wrote in message news:<b97c86e1.0401280729.6bb82949 (AT) posting (DOT) google.com>... Quote: I have a class that I want to contain a const data-member equivalent to eg: int array[8] = {7,11,13,17,19,23,29,31}; What's the simplest way to create such a table inside a class? Thanks, Joe You can make it static and initialize it as follows: class A { public: static const int iarr[2]; }; const int A::iarr[2] = { 0, 1 }; Sheldon. Back to top Gianni Mariani Guest Posted: Thu Jan 29, 2004 3:45 am    Post subject: Re: initializing a const array in a class Joe C wrote: Quote: "Gianni Mariani" <gi2nospam (AT) mariani (DOT) ws> wrote in message news:bv8m63$476 (AT) dispatch (DOT) concentric.net... J. Campbell wrote: I have a class that I want to contain a const data-member equivalent to eg: int array[8] = {7,11,13,17,19,23,29,31}; What's the simplest way to create such a table inside a class? Thanks, Joe How about this ? const int array[8] = {7,11,13,17,19,23,29,31}; struct foo { const int (&m_array)[8]; foo() : m_array( array ) { } }; Gianni, Thanks. This works;-) I'm a little confused by the syntax. What exactly does: const int (&m_array)[8] mean? it says: m_array is a reference to an 8 element array of const int. and how does it differ from a: Quote: const int* to the head of an array? Little except that in the case of the array reference, the compiler "knows" the size of the array - if there was code that depended on the "array" instead of "pointer" behaviour, you preserved it's meaning using the reference. You can also use this information to eliminate some overrun errors. 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.