int RikeiToBunkeiMiwakekata(Hitogata* anta)
{
  ...
  if(anta->nounai.ichi_tasu_ichi == 2)
  {
    result = anta_ha_rikei_desu;
  }
  else
  {
    result = zannen_desuga_bunkei_desu;
  }
  return result;
}