libstdc++-v3/testsuite/26_numerics/headers/cmath/fabs_inline.cc

   1 // Copyright (C) 1999-2024 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // Test to see whether the host provides its own (inline) view of fabs.
  19 // Origin: Kurt Garloff <kurt@garloff.de>, 2001-05-24
  20 // { dg-do link }
  21
  22 #include <cmath>
  23 #include <cstdio>
  24
  25 typedef double (*realfn) (double);
  26
  27 using std::fabs;
  28
  29 int main ()
  30 {
  31   double a = fabs (-2.4);
  32   realfn myfn = fabs;
  33   double b = myfn (-2.5);
  34   std::printf ("%f, %f, %p\n", a, b, myfn);
  35   return 0;
  36 }