1// 1999-11-15 Kevin Ediger  <kediger@licor.com>
2// test the floating point inserters (facet num_put)
3
4// Copyright (C) 1999, 2002, 2003, 2005, 2009 Free Software Foundation, Inc.
5//
6// This file is part of the GNU ISO C++ Library.  This library is free
7// software; you can redistribute it and/or modify it under the
8// terms of the GNU General Public License as published by the
9// Free Software Foundation; either version 3, or (at your option)
10// any later version.
11
12// This library is distributed in the hope that it will be useful,
13// but WITHOUT ANY WARRANTY; without even the implied warranty of
14// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15// GNU General Public License for more details.
16
17// You should have received a copy of the GNU General Public License along
18// with this library; see the file COPYING3.  If not see
19// <http://www.gnu.org/licenses/>.
20
21#include <cmath> // for abs
22#include <cfloat> // for DBL_EPSILON
23#include <sstream>
24#include <limits>
25#include <testsuite_hooks.h>
26
27void
28test05()
29{
30  using namespace std;
31  bool test __attribute__((unused)) = true;
32
33  double pi = 3.14159265358979323846;
34  ostringstream ostr;
35  ostr.precision(20);
36  ostr << pi;
37  string sval = ostr.str();
38  istringstream istr (sval);
39  double d;
40  istr >> d;
41  VERIFY( abs(pi-d)/pi < DBL_EPSILON );
42}
43
44int
45main()
46{
47  test05();
48  return 0;
49}
50