More Math, but Fun This Time

#include <stdio.h>
double phi(double p, int precision)
{
  while(precision)
    return( p + 1/phi(p, precision-1) );
  return(p);
}
int main()
{
  double gr;
  gr = phi(1.0, 15);
  printf("Phi is %f\n", gr);
  
  return(0);
}