userset.h

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#ifndef USERSET_FILE
#define USERSET_FILE
#include <cmath>
double FunctF(double const x, double const y);
 
double FunctU(double const x, double const y);
 
 
inline
double fNice(double const x, double const y)
{
    //return x * x * std::sin(2.5 * M_PI * y);               // solution u
    return std::sin(M_PI*2.5*y)*(M_PI*M_PI*2.5*2.5*x*x - 2); // -Laplacian(u)
}
 
inline
double f_zero(double const x, double const y)
//double f_zero(double const  /*x*/, double const /*y*/)
{
    return 0.0 + 0.0*(x+y);
}
 
#endif