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Diffstat (limited to 'gnu/lib/libg++/g++-include/Normal.h')
-rw-r--r-- | gnu/lib/libg++/g++-include/Normal.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/gnu/lib/libg++/g++-include/Normal.h b/gnu/lib/libg++/g++-include/Normal.h new file mode 100644 index 00000000000..499ecc38cdb --- /dev/null +++ b/gnu/lib/libg++/g++-include/Normal.h @@ -0,0 +1,69 @@ +// This may look like C code, but it is really -*- C++ -*- +/* +Copyright (C) 1988 Free Software Foundation + written by Dirk Grunwald (grunwald@cs.uiuc.edu) + +This file is part of the GNU C++ Library. This library is free +software; you can redistribute it and/or modify it under the terms of +the GNU Library General Public License as published by the Free +Software Foundation; either version 2 of the License, 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 Library General Public License for more details. +You should have received a copy of the GNU Library General Public +License along with this library; if not, write to the Free Software +Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + + $Id: Normal.h,v 1.1 1995/10/18 08:38:17 deraadt Exp $ +*/ + +#ifndef _Normal_h +#ifdef __GNUG__ +#pragma interface +#endif +#define _Normal_h + +#include <Random.h> + +class Normal: public Random { + char haveCachedNormal; + double cachedNormal; + +protected: + double pMean; + double pVariance; + double pStdDev; + +public: + Normal(double xmean, double xvariance, RNG *gen); + double mean(); + double mean(double x); + double variance(); + double variance(double x); + virtual double operator()(); +}; + + +inline Normal::Normal(double xmean, double xvariance, RNG *gen) +: Random(gen) { + pMean = xmean; + pVariance = xvariance; + pStdDev = sqrt(pVariance); + haveCachedNormal = 0; +} + +inline double Normal::mean() { return pMean; }; +inline double Normal::mean(double x) { + double t=pMean; pMean = x; + return t; +} + +inline double Normal::variance() { return pVariance; } +inline double Normal::variance(double x) { + double t=pVariance; pVariance = x; + pStdDev = sqrt(pVariance); + return t; +}; + +#endif |