Gabriele Cosmo
74 lines
2.7 KiB
C++
74 lines
2.7 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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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. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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//
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//
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// $Id: Gamma.hh,v 1.6 2006/06/29 19:14:08 gunter Exp $
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// GEANT4 tag $Name: geant4-08-02 $
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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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