std::seed_seq

 

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Pseudo-casuale generazione

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Seed Sequenze Original: Seed Sequences The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

seed_seq (C++11)

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rand

srand

RAND_MAX

 

std::seed_seq

Membri funzioni Original: Member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

seed_seq::seed_seq

seed_seq::generate

seed_seq::size

seed_seq::param

 

Elemento definito nell'header <random>
class seed_seq;		(dal C++11)

std::seed_seq consuma una sequenza di valori interi dati e produce un numero richiesto di valori interi senza segno i, 0 ≤ i < 232
, sulla base dei dati consumati. I valori prodotti sono distribuiti sull'intera gamma 32-bit, anche se i valori sono vicini consumati.

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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Esso fornisce un modo per seme un gran numero di motori di numeri casuali o un generatore di seme che richiede molta entropia, dato un piccolo seme o una sequenza mal distribuita seme iniziale.

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 soddisfi i requisiti di SeedSequence.

Original:

std::seed_seq meets the requirements of SeedSequence.

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Membri tipi

Membro tipo Original: Member type The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.	Definition
result_type	std::uint_least32_t

Membri funzioni

(costruttore)	costrutti e semi il std :: seed_seq oggetto Original: constructs and seeds the std::seed_seq object The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)
operator= (cancellato)	non copia-assegnabile Original: not copy-assignable The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)
generate	calcola i polarizzazione-eliminati, uniformemente distribuiti valori a 32 bit Original: calculates the bias-eliminated, evenly distributed 32-bit values The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)
size	ottiene il numero di valori a 32 bit memorizzati in std :: seed_seq Original: obtains the number of 32-bit values stored in std::seed_seq The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)
param	ottiene i valori a 32 bit memorizzati in std :: seed_seq Original: obtains the 32-bit values stored in std::seed_seq The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)

Esempio

#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