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std::seed_seq::seed_seq

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< cpp‎ | numeric‎ | random‎ | seed seq

 
 
Bibliothèque Numerics
Fonctions mathématiques courantes
Virgule flottante environnement
Nombres complexes
Tableaux numériques
La génération de nombres pseudo-aléatoires
Moment de la compilation arithmétique rationnelle (C++11)
Génériques des opérations numériques
Original:
Generic numeric operations
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iota (C++11)
accumulate
inner_product
adjacent_difference
partial_sum
 
La génération de nombres pseudo-aléatoires
Les moteurs et les adaptateurs de moteur
Original:
Engines and engine adaptors
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linear_congruential_engine (C++11)
mersenne_twister_engine (C++11)
subtract_with_carry_engine (C++11)
discard_block_engine (C++11)
independent_bits_engine (C++11)
shuffle_order_engine (C++11)
Générateurs
Original:
Generators
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random_device (C++11)
Les distributions
Original:
Distributions
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Distributions uniformes
Original:
Uniform distributions
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uniform_int_distribution (C++11)
uniform_real_distribution (C++11)
generate_canonical (C++11)
Distributions de Bernoulli
Original:
Bernoulli distributions
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bernoulli_distribution (C++11)
binomial_distribution (C++11)
negative_binomial_distribution (C++11)
geometric_distribution (C++11)
Distributions de Poisson
Original:
Poisson distributions
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poisson_distribution (C++11)
exponential_distribution (C++11)
gamma_distribution (C++11)
weibull_distribution (C++11)
extreme_value_distribution (C++11)
Les distributions normales
Original:
Normal distributions
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normal_distribution (C++11)
lognormal_distribution (C++11)
chi_squared_distribution (C++11)
cauchy_distribution (C++11)
fisher_f_distribution (C++11)
student_t_distribution (C++11)
Distributions d'échantillonnage
Original:
Sampling distributions
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discrete_distribution (C++11)
piecewise_constant_distribution (C++11)
piecewise_linear_distribution (C++11)
Séquences de semences
Original:
Seed Sequences
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seed_seq (C++11)
Bibliothèque C
Original:
C library
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rand
srand
RAND_MAX
 
std::seed_seq
Les fonctions membres
Original:
Member functions
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seed_seq::seed_seq
seed_seq::generate
seed_seq::size
seed_seq::param
 
seed_seq();
(1) (depuis C++11)
seed_seq( const seed_seq& ) = delete;
(2) (depuis C++11)
template< class InputIt >
seed_seq( InputIt begin, InputIt end );
(3) (depuis C++11)
template< class T >
seed_seq( std::initializer_list<T> il );
(4) (depuis C++11)
1)
Le constructeur par défaut crée un objet std::seed_seq avec une séquence de lancement initial de longueur nulle .
Original:
The default constructor creates a std::seed_seq object with an initial seed sequence of length zero.
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2)
Le constructeur de copie est supprimée: std::seed_seq n'est pas copiable .
Original:
The copy constructor is deleted: std::seed_seq is not copyable.
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3)
Construit un std::seed_seq avec la séquence de lancement initial obtenu par itération sur la plage [begin, end) et de copier les valeurs obtenues par le déréférencement de l'itérateur, modulo 232
(c'est à dire les bits inférieurs 32 sont copiés)
Original:
Constructs a std::seed_seq with the initial seed sequence obtained by iterating over the range [begin, end) and copying the values obtained by dereferencing the iterator, modulo 232
(that is, the lower 32 bits are copied)
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4)
Equivalent à seed_seq(il.begin(), il.end()). Ce constructeur permet liste d'initialisation .
Original:
Equivalent to seed_seq(il.begin(), il.end()). This constructor enables liste d'initialisation.
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[modifier] Paramètres

begin, end -
la séquence de départ initiale représentée comme une paire d'itérateurs d'entrée dont std::iterator_traits<>::value_type est un type entier
Original:
the initial seed sequence represented as a pair of input iterators whose std::iterator_traits<>::value_type is an integer type
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il -
std::initializer_list d'objets de type entier, fournissant la séquence de semences iniial
Original:
std::initializer_list of objects of integer type, providing the iniial seed sequence
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Type requirements
-
InputIt must meet the requirements of InputIterator.

[modifier] Exemple

#include <random>
#include <sstream>
#include <iterator>
int main()
{
    std::seed_seq s1; // default-constructible
    std::seed_seq s2{1, 2, 3}; // can use list-initialization
    std::seed_seq s3 = {-1, 0, 1}; // another form of list-initialization
    int a[10] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
    std::seed_seq s4(a, a + 10); // can use iterators
    std::istringstream buf("1 2 3 4 5"); 
    std::istream_iterator<int> beg(buf), end;
    std::seed_seq s5(beg, end); // even stream input iterators
}