Mathc initiation/Fichiers c : c51c1a

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	x_cylrkz.h

/* --------------------------------- */
/* save as x_cylrkz.h                */
/* --------------------------------- */
double cylindrical_r_drdkdz(

double (*P_f)(double r, double k, double z),

double (*Pr0)(double k, double z),
double (*Pr1)(double k, double z),
   int nr,
   
double k,
   
double z
)
{
double r = 0;

   int i = 0;
double m = 0.;
double M = 0.;

 for(i = 0; i <= nr; i++)
 {
       if(i ==0 || i== nr){m = 1.;}
  else if(fmod(i,2) ==  0){m = 2.;}
  else                    {m = 4.;}

  r = ((*Pr0)(k,z)) + i*(((*Pr1)(k,z))-((*Pr0)(k,z)))/nr;
 
  M += m * (*P_f)(r, k, z) * r;
 }

  return( ((((*Pr1)(k,z)) -((*Pr0)(k,z)))*M) / (3*nr) );
}
/* --------------------------------- */
double cylindrical_k_drdkdz(
double (*P_f)(double r, double k, double z),
   
double (*Pr0)(double k, double z),
double (*Pr1)(double k, double z),
   int   nr,

double (*Pk0)(double r),
double (*Pk1)(double r),
   int   nk,
   
double z
)
{
   int i = 0;
double m = 0.;
double M = 0.;

 for(i = 0; i <= nk; i++)
 {
       if(i ==0 || i== nk){m = 1.;}
  else if(fmod(i,2) ==  0){m = 2.;}
  else                    {m = 4.;}

  M += m * cylindrical_r_drdkdz(  
                             (*P_f),                           
                             (*Pr0),(*Pr1),nr,                               
                           (((*Pk0)(z))+i*(((*Pk1)(z))-((*Pk0)(z)))/nk),                               
                              z);
 }

 return( ((((*Pk1)(z)) -((*Pk0)(z)))*M) / (3*nk) );
}
/* --------------------------------- */
double cylindrical_drdkdz(
double (*P_f)(double r, double k, double z),
   
double (*Pr0)(double k, double z),
double (*Pr1)(double k, double z),
   int   nr,
   
double (*Pk0)(double r),
double (*Pk1)(double r),
   int   nk,

double z0,
double z1,
   int nz
)
{
   int i = 0;
double m = 0.;
double M = 0.;

 for(i = 0; i <= nz; i++)
 {
       if(i ==0 || i== nz){m = 1.;}
  else if(fmod(i,2) ==  0){m = 2.;}
  else                    {m = 4.;}

  M += m * cylindrical_k_drdkdz(
                             (*P_f),
                             (*Pr0),(*Pr1),nr,                             
                             (*Pk0),(*Pk1),nk,                                
                             (z0+i*(z1-z0)/nz));
 }

  return( ((z1 -z0)*M) / (3*nz) );
}
/* --------------------------------- */
/* --------------------------------- */