power() [1/2]

ring_elem Z_mod::power ( const ring_elem f, int n ) const

virtual

Reimplemented from Ring.

Definition at line 251 of file ZZp.cpp.

{
  if (f.get_int() == _ZERO) {
    if (n < 0)
      throw exc::division_by_zero_error();
    else if (n == 0)
      return ring_elem(0); // this is the element one in this ring.  (P-1) is the zero element...
    return ring_elem(_ZERO);
  }
  int m = (f.get_int() * n) % _P1;
  if (m < 0) m += _P1;
  return ring_elem(m);
}

References _P1, _ZERO, and ring_elem::get_int().