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std::seed_seq

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C++
 
Numerik-Bibliothek
Gemeinsame mathematischen Funktionen
Floating-Point-Umgebung
Komplexe Zahlen
Numerische Arrays
Pseudo-Zufallszahlen
Compile-time rationale Arithmetik (C++11)
Generische numerische Operationen
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Generic numeric operations
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iota(C++11)
accumulate
inner_product
adjacent_difference
partial_sum
 
Pseudo-Zufallszahlen
Motoren und Adaptern
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)
Generatoren
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Generators
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random_device(C++11)
Ausschüttungen
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Distributions
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Uniform-Distributionen
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Uniform distributions
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uniform_int_distribution(C++11)
uniform_real_distribution(C++11)
generate_canonical(C++11)
Bernoulli-Distributionen
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Bernoulli distributions
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bernoulli_distribution(C++11)
binomial_distribution(C++11)
negative_binomial_distribution(C++11)
geometric_distribution(C++11)
Poisson-Verteilungen
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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)
Normalverteilungen
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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)
Sampling-Distributionen
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Sampling distributions
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discrete_distribution(C++11)
piecewise_constant_distribution(C++11)
piecewise_linear_distribution(C++11)
Seed-Sequenzen
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Seed Sequences
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seed_seq(C++11)
C-Bibliothek
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C library
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rand
srand
RAND_MAX
 
std::seed_seq
Member-Funktionen
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Member functions
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seed_seq::seed_seq
seed_seq::generate
seed_seq::size
seed_seq::param
 
definiert in Header <random>
class seed_seq;
 (seit C++11)
std::seed_seq verbraucht eine Folge von ganzzahligen Daten und erzeugt eine angeforderte Anzahl von nicht-vorzeichenbehafteten Ganzzahlen i, 0 ≤ i < 232
, bezogen auf den verbrauchten Daten. Die erzeugten Werte werden über den gesamten 32-Bit-Bereich, auch wenn die verbrauchten Werte nahe verteilt sind .
Original:
std::seed_seq consumes a sequence of integer-valued data and produces a requested number of unsigned integer values i, 0 ≤ i < 232
, based on the consumed data. The produced values are distributed over the entire 32-bit range even if the consumed values are close.
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Es bietet eine Möglichkeit, Saatgut eine große Anzahl von Zufallszahlen Motoren oder auf Saatgut einen Generator, der eine Menge von Entropie erfordert, da ein kleiner Samen oder eine schlecht verteilt Anfangssaatmaterial Sequenz .
Original:
It provides a way to seed a large number of random number engines or to seed a generator that requires a lot of entropy, given a small seed or a poorly distributed initial seed sequence.
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std::seed_seq erfüllt die Anforderungen der SeedSequence .
Original:
std::seed_seq meets the requirements of SeedSequence.
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[Bearbeiten] Mitglied Typen

Mitglied Typ
Original:
Member type
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 Definition
result_type std::uint_least32_t

[Bearbeiten] Member-Funktionen
Konstrukte und Samen die std :: seed_seq Objekt
Original:
constructs and seeds the std::seed_seq object
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(öffentliche Elementfunktion)
operator=
(gelöscht)
nicht kopieren übertragbar
Original:
not copy-assignable
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(öffentliche Elementfunktion)
berechnet die Verzerrung eliminiert, gleichmäßig verteilte 32-Bit-Werte
Original:
calculates the bias-eliminated, evenly distributed 32-bit values
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(öffentliche Elementfunktion)
erhält die Anzahl von 32-Bit-Werte in std :: seed_seq gespeichert
Original:
obtains the number of 32-bit values stored in std::seed_seq
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(öffentliche Elementfunktion)
erhält die 32-Bit-Werte in std :: seed_seq gespeichert
Original:
obtains the 32-bit values stored in std::seed_seq
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(öffentliche Elementfunktion)

[Bearbeiten] Beispiel

#include <random>
#include <iostream>
 
int main()
{
    std::seed_seq seq({1,2,3,4,5});
    std::vector<std::uint32_t> seeds(10);
    seq.generate(seeds.begin(), seeds.end());
    for(std::uint32_t n : seeds)
        std::cout << n << '\n';
}

Output: 

4204997637
4246533866
1856049002
1129615051
690460811
1075771511
46783058
3904109078
1534123438
1495905678
Von „https://de.cppreference.com/mwiki/index.php?title=cpp/numeric/random/seed_seq&oldid=27635“