/* ---------------------------------- */
/* save as fb.h                       */
/* --------------------------------- */
double f(
double x,
double y)
{
 return(  (x) );
}
/* --------------------------------- */
char  feq[] = "x";
/* --------------------------------- */
/* --------------------------------- */
double u(
double y)
{
 return(      (y*y) );
}
/* --------------------------------- */
char  ueq[] = "y**2";
/* --------------------------------- */
/* --------------------------------- */
double v(
double y)
{
 return(      (4) );
}
/* --------------------------------- */
char  veq[] = "4";
/* --------------------------------- */
/* --------------------------------- */
double g(
double x,
double y)
{
 return       (x*  (x) );
}
/* --------------------------------- */
char  geq[] = "x*  x";
/* --------------------------------- */
/* --------------------------------- */
double h(
double x,
double y)
{
 return       (y*  (x) );
}
/* --------------------------------- */
char  heq[] = "y*  x";
/* --------------------------------- */
/* --------------------------------- */