1// 1999-11-15 Kevin Ediger <kediger@licor.com> 2// test the floating point inserters (facet num_put) 3 4// Copyright (C) 1999-2015 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