// filename:c2011-7-12-3-1-ex.c // original examples and/or notes: // (c) ISO/IEC JTC1 SC22 WG14 N1570, April 12, 2011 // http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1570.pdf // C2011 7.12.3.1 The fpclassify macro // compile and output mechanism: // (c) Ogawa Kiyoshi, kaizen@gifu-u.ac.jp, December.29, 2013 // compile errors and/or wornings: // 1 (c) Apple LLVM version 4.2 (clang-425.0.27) (based on LLVM 3.2svn) // Target: x86_64-apple-darwin11.4.2 //Thread model: posix // (c) LLVM 2003-2009 University of Illinois at Urbana-Champaign. // 2 gcc-4.9 (GCC) 4.9.0 20131229 (experimental) // Copyright (C) 2013 Free Software Foundation, Inc. #include // #include //#undef fpclassify // Example #define fpclassify(x) \ ((sizeof (x) == sizeof (float)) ? __fpclassifyf(x) : \ (sizeof (x) == sizeof (double)) ? __fpclassifyd(x) : \ __fpclassifyl(x)) int main(void) { return printf("7.12.3.1 The fpclassify macro %d\n", fpclassify(34928348332.2341)); } // warning may be // 7.12.3.1 The fpclassify macro 4