fabs_inline.cc

来自「俄罗斯高人Mamaich的Pocket gcc编译器（运行在PocketPC上）」· CC 代码 · 共 38 行

// Copyright (C) 1999, 2002 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 2, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING.  If not, write to the Free
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.

// Test to see whether the host provides its own (inline) view of fabs.
// Origin: Kurt Garloff <[e-mail]>, 2001-05-24
// dg-do link

#include <cmath>
#include <cstdio>

typedef double (*realfn) (double);

using std::fabs;

int main ()
{
  double a = fabs (-2.4);
  realfn myfn = fabs;
  double b = myfn (-2.5);
  std::printf ("%f, %f, %p\n", a, b, myfn);
  return 0;
}