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1 | // 1999-11-15 Kevin Ediger <kediger@licor.com> |
2 | // test the floating point inserters (facet num_put) | |
53279c10 | 3 | |
83ffe9cd | 4 | // Copyright (C) 1999-2023 Free Software Foundation, Inc. |
53279c10 JQ |
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 | |
748086b7 | 9 | // Free Software Foundation; either version 3, or (at your option) |
53279c10 JQ |
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 | |
748086b7 JJ |
18 | // with this library; see the file COPYING3. If not see |
19 | // <http://www.gnu.org/licenses/>. | |
53279c10 | 20 | |
23cac885 BK |
21 | #include <cmath> // for abs |
22 | #include <cfloat> // for DBL_EPSILON | |
23 | #include <sstream> | |
24 | #include <limits> | |
53279c10 JQ |
25 | #include <testsuite_hooks.h> |
26 | ||
23cac885 BK |
27 | void |
28 | test05() | |
53279c10 | 29 | { |
ba4b172f | 30 | using namespace std; |
ba4b172f | 31 | |
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32 | double pi = 3.14159265358979323846; |
33 | ostringstream ostr; | |
34 | ostr.precision(20); | |
35 | ostr << pi; | |
36 | string sval = ostr.str(); | |
37 | istringstream istr (sval); | |
38 | double d; | |
39 | istr >> d; | |
40 | VERIFY( abs(pi-d)/pi < DBL_EPSILON ); | |
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41 | } |
42 | ||
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43 | int |
44 | main() | |
53279c10 | 45 | { |
23cac885 | 46 | test05(); |
53279c10 JQ |
47 | return 0; |
48 | } |