enum WorkMode { INI = 0, FIGHT, MAINTAIN, TRAIN } work_state;

int main ( void )
{
  int i = 0;
  int j = 0;

  //...

  switch ( work_state )  //遵循1
  {
    case INI:
      i = 1;
      break;
    case FIGHT:
      i = 2;
      break;
    case MAINTAIN:
      i = 3;
      break;
    case TRAIN:
      i = 0;
      break;
  }

  switch ( i )           //遵循2
  {
    case 0:
      j = 0;
      break;
    case 1:  /* 共用 */
    case 2:
      j = 1;
      break;
    default:
      j = -1;
      break;
  }

  return ( 0 );
}