/** @file time_lw_E.cpp * * Test E from the paper "Comparison of Polynomial-Oriented CAS" by Robert H. * Lewis and Michael Wester. */ /* * GiNaC Copyright (C) 1999-2005 Johannes Gutenberg University Mainz, Germany * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "times.h" static unsigned test() { ex s; symbol y("y"); symbol t("t"); for (int i=1; i<=10; ++i) s += i*y*pow(t,i)/pow(y + abs(5-i)*t,i); s = s.normal(); if (s.subs(t==0)!=0) { clog << "something very strange happened" << endl; return 1; } return 0; } unsigned time_lw_E() { unsigned result = 0; unsigned count = 0; timer rolex; double time = .0; cout << "timing Lewis-Wester test E (normalized sum of rational fcns)" << flush; clog << "-------Lewis-Wester test E (normalized sum of rational fcns):" << endl; rolex.start(); // correct for very small times: do { result = test(); ++count; } while ((time=rolex.read())<0.1 && !result); cout << '.' << flush; if (!result) { cout << " passed "; clog << "(no output)" << endl; } else { cout << " failed "; } cout << int(1000*(time/count))*0.001 << 's' << endl; return result; }