Gabriele Cosmo
71 lines
2.5 KiB
C++
71 lines
2.5 KiB
C++
//
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// ********************************************************************
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// * DISCLAIMER *
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// * *
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// * The following disclaimer summarizes all the specific disclaimers *
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// * of contributors to this software. The specific disclaimers,which *
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// * govern, are listed with their locations in: *
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// * http://cern.ch/geant4/license *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. *
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// * *
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// * This code implementation is the intellectual property of the *
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// * GEANT4 collaboration. *
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// * By copying, distributing or modifying the Program (or any work *
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// * based on the Program) you indicate your acceptance of this *
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// * statement, and all its terms. *
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// ********************************************************************
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//
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//
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//
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// $Id: Gamma.hh,v 1.5 2005/10/04 09:08:33 gcosmo Exp $
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// GEANT4 tag $Name: geant4-08-00 $
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//
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//
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//---------------------------------------------------------------
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// GEANT 4 class header file
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//
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// Gamma
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//
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// Class description:
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//
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// Gamma function.
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//---------------------------------------------------------------
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#ifndef MYGAMMA_H
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#define MYGAMMA_H
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#include <cmath>
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class MyGamma
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{
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public:
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MyGamma ();
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~MyGamma();
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double Gamma(double z);
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double Gamma(double a,double x);
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private:
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double GamCf(double a,double x);
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double GamSer(double a,double x);
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// Abs
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static short Abs(short d) { return (d > 0) ? d : -d; }
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static int Abs(int d) { return (d > 0) ? d : -d; }
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static long Abs(long d) { return (d > 0) ? d : -d; }
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static float Abs(float d) { return (d > 0) ? d : -d; }
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static double Abs(double d) { return (d > 0) ? d : -d; }
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static double LnGamma(double z);
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static double Log(double x) { return std::log(x); }
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static double Exp(double x) { return std::exp(x); }
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};
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#endif
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