1 /** @file time_lw_B.cpp
3 * Test B from the paper "Comparison of Polynomial-Oriented CAS" by Robert H.
4 * Lewis and Michael Wester. */
7 * GiNaC Copyright (C) 1999-2005 Johannes Gutenberg University Mainz, Germany
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 static unsigned test()
30 for (int i=1; i<=1000; ++i)
31 s += numeric(i).inverse();
33 if (abs(s.evalf()-numeric("7.4854708605503449"))>numeric("2.0E-16")) {
34 clog << "sum(1/i,i=1..1000) erroneously returned " << s << endl;
47 cout << "timing Lewis-Wester test B (sum of rational numbers)" << flush;
48 clog << "-------Lewis-Wester test B (sum of rational numbers):" << endl;
51 // correct for very small times:
55 } while ((time=rolex.read())<0.1 && !result);
60 clog << "(no output)" << endl;
64 cout << int(1000*(time/count))*0.001 << 's' << endl;