parity.hpp

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//******************************************************************************
//******************************************************************************
 
#ifndef parity_hpp
#define parity_hpp
 
#include <cmath>
 
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
class parity {
public:
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
    virtual double f(const double x) const=0;
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
    virtual double df(const double x) const=0;
};
 
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
class sine : public parity {
public:
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
    inline double f(const double x) const final {
        return sin(x);
    };
 
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
    inline double df(const double x) const final {
        return cos(x);
    };
};
 
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
class cosine : public parity {
public:
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
    inline double f(const double x) const final {
        return cos(x);
    };
 
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
    inline double df(const double x) const final {
        return -sin(x);
    };
};
 
#endif