From -1497750815259781663 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: f78e5,3b2d33f1a39395a6 X-Google-Attributes: gidf78e5,public From: James Kuyper Subject: Re: Getting system time Date: 1999/03/15 Message-ID: <36EC0979.A3352AEF@wizard.net>#1/1 X-Deja-AN: 455095820 X-NNTP-Posting-Host: 209.8.153.20 Content-Transfer-Encoding: 7bit Approved: stephen.clamage@sun.com (comp.std.c++) References: <36E9A091.8E626706@technologist.com> X-UID: 0000000001 X-Status: $$$T Content-Type: text/plain; charset=us-ascii X-Trace: news6.ispnews.com 921438432 209.8.153.20 (Sun, 14 Mar 1999 14:07:12 EDT) Organization: Not Enough Mime-Version: 1.0 NNTP-Posting-Date: Sun, 14 Mar 1999 14:07:12 EDT Newsgroups: comp.std.c++ Originator: clamage@taumet Lars Thorup wrote: > > David R Tribble wrote in message <36E9A091.8E626706@technologist.com>... > >Robert Batusek wrote: > >> Is there any _portable_ (ANSI compatible) C++ possibility to get the > >> system time? > >> I have tried ftime but it doesn't work together with fstreams. > > > >Use time(), which is declared in and . It's the > >same as the standard C (C89) library function. (ftime() is System > >V Unix, and is deprecated.) > > Be aware though, that the type time_t, which is the result type > of the time() function, on many platforms cannot hold dates after the > year 2038. Presumably, that will get fixed some time before 2040 :-). > So even though time() is portable between different platforms it is _not_ > portable between different decades... :-( The solution to that problem, of course, is to convert the time returned into a struct tm using gmtime(), and from there converting it into a text string using asctime() or strftime() or time_put<>. In the reverse direction, you can only use time_get<>, since neither asctime() nor strftime() has a standardized inverse function. [ comp.std.c++ is moderated. To submit articles, try just posting with ] [ your news-reader. If that fails, use mailto:std-c++@ncar.ucar.edu ] [ --- Please see the FAQ before posting. --- ] [ FAQ: http://reality.sgi.com/austern_mti/std-c++/faq.html ]