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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libstdc++-v3/] [testsuite/] [26_numerics/] [random/] [discrete_distribution/] [cons/] [num_xbound_fun.cc] - Rev 774
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// { dg-options "-std=c++0x" } // { dg-require-cstdint "" } // // 2008-12-03 Edward M. Smith-Rowland <3dw4rd@verizon.net> // // Copyright (C) 2008, 2009 Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library 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 3, or (at your option) // any later version. // // This library 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 library; see the file COPYING3. If not see // <http://www.gnu.org/licenses/>. // 26.4.8.5.1 Class template discrete_distribution [rand.dist.samp.discrete] // 26.4.2.4 Concept RandomNumberDistribution [rand.concept.dist] #include <random> #include <cmath> #include <testsuite_hooks.h> struct cosine_distribution { cosine_distribution(double x0, double lambda) : _M_x0(x0), _M_lambda(lambda) { } double operator()(double x) { if (x - _M_x0 < -_M_lambda / 4) return 0.0; else if (x - _M_x0 > _M_lambda / 4) return 0.0; else { const double pi = 3.14159265358979323846; return std::cos(2 * pi * (x - _M_x0) / _M_lambda); } } private: double _M_x0; double _M_lambda; }; void test01() { bool test __attribute__((unused)) = true; cosine_distribution cd(1.5, 3.0); std::discrete_distribution<> u(21, -10.0, 10.0, cd); std::vector<double> probablility = u.probabilities(); VERIFY( probablility.size() == 21 ); } int main() { test01(); return 0; }
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