C++Talk.NET C++ language newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  pos_type - How to define it ?          C++Talk.NET Forum Index -> C++ language (comp.lang.c++) View previous topic :: View next topic   Author Message Rakesh Sinha Guest Posted: Sat Dec 18, 2004 11:00 am    Post subject: pos_type - How to define it ? Hello, I am writing this application for which I need to determine the file size. My code looks roughly as follows. #include <fstream> #include <iostream> using std::ifstream; ifstream fp; fp.open("myfile", ios::binary); ifp.seekg(0, ios::end); pos_type length = ifp.tellg(); //Process with length std::cout << "Length of file " << length << std::endl; My problem is where is pos_type defined ? I can make an approximation like unsigned long instead of it to get around , but I would not like to do that. I referred to the C++ 2003 standards and here is what I had found it then. [lib.ios] 27.4.4 namespace std { .. class basic_ios : public ios_base { public: // Types: typedef typename traits::pos_type pos_type; }; } How would I use this type in my program ? Back to top David Harmon Guest Posted: Sat Dec 18, 2004 6:53 pm    Post subject: Re: pos_type - How to define it ? On 18 Dec 2004 03:00:23 -0800 in comp.lang.c++, "Rakesh Sinha" <rakesh_usenet (AT) yahoo (DOT) com> wrote, Quote: ifp.seekg(0, ios::end); pos_type length = ifp.tellg(); Should be: ios::pos_type length = ifp.tellg(); or std::ios::pos_type length = ifp.tellg(); Back to top Jonathan Turkanis Guest Posted: Sat Dec 18, 2004 9:28 pm    Post subject: Re: pos_type - How to define it ? David Harmon wrote: Quote: On 18 Dec 2004 03:00:23 -0800 in comp.lang.c++, "Rakesh Sinha" [email]rakesh_usenet (AT) yahoo (DOT) com[/email]> wrote, ifp.seekg(0, ios::end); pos_type length = ifp.tellg(); Should be: ios::pos_type length = ifp.tellg(); or std::ios::pos_type length = ifp.tellg(); Also note that pos_type (which is usually just std::streampos) is not an integral type, but is convertible to one. Jonathan 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.