On Sat, 2007-09-15 at 13:53 -0400, Kamaraju S Kusumanchi wrote: > 2) The above code uses DBL_MANT_DIG macro. How can I easily find out where > this macro is defined? Is there any book or reference which discuss this > kind of macros. For now I did a grep in /usr/include and found that such a > macro is defined in /usr/include/c++/4.2/limits file. This brings up > another question. > > If you are using a macro defined in a standard c++ library header, shouldn't > the file be named test-round.cpp instead of test-round.c?
The GNU C Library Reference Manual is a great reference for the standard C library. According to its text, the macro is defined to be included by float.h. For details, see Info node (libc)Floating Point Parameters. -- ;;; Stephen Compall ** http://scompall.nocandysw.com/blog ** "Peta" is Greek for fifth; a petabyte is 10 to the fifth power, as well as fifth in line after kilo, mega, giga, and tera. -- Lee Gomes, performing every Wednesday in his tech column "Portals" on page B1 of The Wall Street Journal
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