unordered_set::max_load_factor
Obtient ou définit les éléments maximum de chaque compartiment.
float max_load_factor() const;
void max_load_factor(float factor);
Paramètres
- factor
Le nouveau facteur de chargement maximale.
Notes
La première fonction membre retourne le facteur de chargement maximale stocké. La deuxième fonction membre remplace le facteur de chargement maximal stocké par factor.
Exemple
// std_tr1__unordered_set__unordered_set_max_load_factor.cpp
// compile with: /EHsc
#include <unordered_set>
#include <iostream>
typedef std::unordered_set<char> Myset;
int main()
{
Myset c1;
c1.insert('a');
c1.insert('b');
c1.insert('c');
// display contents " [c] [b] [a]"
for (Myset::const_iterator it = c1.begin();
it != c1.end(); ++it)
std::cout << " [" << *it << "]";
std::cout << std::endl;
// inspect current parameters
std::cout << "bucket_count() == " << c1.bucket_count() << std::endl;
std::cout << "load_factor() == " << c1.load_factor() << std::endl;
std::cout << "max_bucket_count() == "
<< c1.max_bucket_count() << std::endl;
std::cout << "max_load_factor() == "
<< c1.max_load_factor() << std::endl;
std::cout << std::endl;
// change max_load_factor and redisplay
c1.max_load_factor(0.10f);
std::cout << "bucket_count() == " << c1.bucket_count() << std::endl;
std::cout << "load_factor() == " << c1.load_factor() << std::endl;
std::cout << "max_bucket_count() == "
<< c1.max_bucket_count() << std::endl;
std::cout << "max_load_factor() == "
<< c1.max_load_factor() << std::endl;
std::cout << std::endl;
// rehash and redisplay
c1.rehash(100);
std::cout << "bucket_count() == " << c1.bucket_count() << std::endl;
std::cout << "load_factor() == " << c1.load_factor() << std::endl;
std::cout << "max_bucket_count() == "
<< c1.max_bucket_count() << std::endl;
std::cout << "max_load_factor() == "
<< c1.max_load_factor() << std::endl;
std::cout << std::endl;
return (0);
}
Configuration requise
Header: <unordered_set>
Espace de noms : std