Cintot

if(p->RoomsCount==p->ptr->RoomsCount)  // ptr == nullptr;

struct OLS
{
  int RoomsCount;
  int floor;
  float square;
  OLS *ptr;
  friend bool operator==(OLS& a, OLS& b);
};

typedef OLS* pOLS;

bool operator==(OLS& a, OLS& b)
{
    return (a.RoomsCount == b.RoomsCount) &&
           (a.floor == b.floor) &&
           (a.square != b.square);
}

void CompAndFind(pOLS& str) 
{
  if(!str) return;// nullptr
  pOLS p = str;
  while(p->ptr)
  {
      if(*p == *(p->ptr))
      {
          show(p);
      }
      p = p->ptr;
  }
}

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$dbi = new PDO("mysql:dbname=$nameofdbi;host=$hosti", $dbusernamei, $dbpasswordi, array(PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES utf8"));
$a = $_POST['lol'];
$query = "INSERT INTO `usr`.`rtm` (`lol`) VALUES (?)";
$stmt = $dbi->prepare($query);
$stmt->bindParam(1, $a, PDO::PARAM_STR);
$stmt->execute();

find . -regex ".*my_company.*" ! -regex ".*my_company_\(agent\).*\.log" | xargs tail