Mathc initiation/Fichiers c : c51c1b

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	x_cylrzk.h

/* --------------------------------- */
/* save as x_cylrzk.h                */
/* --------------------------------- */
double cylindrical_r_drdzdk(

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

double (*Pr0)(double k, double z),
double (*Pr1)(double k, double z),
   int nr,
   
double z,

double k
)
{
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_z_drdzdk(
double (*P_f)(double r, double k, double z),
   
double (*Pr0)(double k, double z),
double (*Pr1)(double k, double z),
   int   nr,

double (*Pz0)(double r),
double (*Pz1)(double r),
   int   nz,
   
double k
)
{
   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_r_drdzdk(
                             (*P_f),                           
                             (*Pr0),(*Pr1),nr,                                
                           (((*Pz0)(k))+i*(((*Pz1)(k))-((*Pz0)(k)))/nz),                                
                                k);
 }

 return( ((((*Pz1)(k)) -((*Pz0)(k)))*M) / (3*nz) );
}
/* --------------------------------- */
double cylindrical_drdzdk(
double (*P_f)(double r, double k, double z), 
   
double (*Pr0)(double k, double z),
double (*Pr1)(double k, double z),
int   nr,

double (*Pz0)(double r),
double (*Pz1)(double r),
   int   nz,


double k0,
double k1,
   int nk
)
{
   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_z_drdzdk(
                             (*P_f),                              
                             (*Pr0),(*Pr1),nr,                             
                             (*Pz0),(*Pz1),nz,  
                             (k0+i*(k1-k0)/nk));
 }

  return( ((k1 -k0)*M) / (3*nk) );
}
/* --------------------------------- */
/* --------------------------------- */

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