1 /** @file time_lw_H.cpp
3 * Test H from the paper "Comparison of Polynomial-Oriented CAS" by Robert H.
4 * Lewis and Michael Wester. */
7 * GiNaC Copyright (C) 1999-2001 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.
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21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 static unsigned test(void)
30 for (unsigned r=0; r<80; ++r)
31 for (unsigned c=0; c<80; ++c)
32 h80.set(r,c,numeric(1,r+c+1));
33 ex det = h80.determinant();
35 if (abs(det.evalf()-numeric(".10097939769690107E-3789"))>numeric("1.E-3800")) {
36 clog << "determinant of 80x80 erroneously returned " << det << endl;
42 unsigned time_lw_H(void)
49 cout << "timing Lewis-Wester test H (det of 80x80 Hilbert)" << flush;
50 clog << "-------Lewis-Wester test H (det of 80x80 Hilbert)" << endl;
53 // correct for very small times:
57 } while ((time=rolex.read())<0.1 && !result);
62 clog << "(no output)" << endl;
66 cout << int(1000*(time/count))*0.001 << 's' << endl;