std::bitset::operator[]

 

C++

Linguaggio

Concetti

Libreria di Utilità

Stringhe

Contenitori

Algoritmi

Iteratori

Libreria matematca

Input/output

Localizzazione

Espressioni regolari(C++11)

Operazioni atomicche(C++11)

Multithreading(C++11)

 

Utilità libreria

Tipo di supporto (basic types, RTTI, type traits)

Gestione della memoria dinamica

La gestione degli errori

Programma di utilità

Funzioni variadic

Data e ora

Funzione oggetti

initializer_list (C++11)

bitset

hash (C++11)

Gli operatori relazionali Original: Relational operators The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

rel_ops::operator!= rel_ops::operator> rel_ops::operator<= rel_ops::operator>=

Coppie e tuple Original: Pairs and tuples The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

pair

tuple (C++11)

piecewise_construct_t (C++11)

piecewise_construct (C++11)

Swap, in avanti e spostare Original: Swap, forward and move The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

swap

forward (C++11)

move (C++11)

move_if_noexcept (C++11)

declval (C++11)

 

std::bitset

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

bitset::reference

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.

bitset::bitset

bitset::operator== bitset::operator!=

Elemento accesso Original: Element access The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

bitset::operator[]

bitset::test

bitset::all bitset::any bitset::none (C++11)

bitset::count

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

bitset::size

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

bitset::operator&= bitset::operator|= bitset::operator^= bitset::operator~

bitset::operator<<= bitset::operator>>= bitset::operator<< bitset::operator>>

bitset::set

bitset::reset

bitset::flip

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

bitset::to_string

bitset::to_ulong

bitset::to_ullong (C++11)

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

operator& operator| operator^

operator<< operator>>

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

std::hash (C++11)

 

bool operator[](std::size_t pos )const; constexprbool operator[](std::size_t pos )const;	(1)	(fino al c++11) (dal C++11)
reference operator[](std::size_t pos );	(2)

Accede al bit in pos posizione. La prima versione restituisce il valore del bit, la seconda versione restituisce un oggetto di std::bitset::reference tipo che consente la modifica del valore.

Original:

Accesses the bit at position pos. The first version returns the value of the bit, the second version returns an object of type std::bitset::reference that allows modification of the value.

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A differenza di test(), non genera eccezioni: il comportamento è indefinito se pos è fuori dai limiti.

Original:

Unlike test(), does not throw exceptions: the behavior is undefined if pos is out of bounds.

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Parametri

pos

-

posizione del bit di ritornare Original: position of the bit to return The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Valore di ritorno

1)

il valore del bit richiesto

Original:

the value of the requested bit

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2)

un oggetto di tipo std::bitset::reference, che permette la scrittura del bit richiesto.

Original:

an object of type std::bitset::reference, which allows writing to the requested bit.

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Eccezioni

Nessuno

Original:

None

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Esempio

#include <iostream>#include <bitset>   int main(){std::bitset<8> b1(42);for(std::size_t i =0; i < b1.size();++i){std::cout<<"b1["<< i <<"]: "<< b1[i]<<'\n';} b1[0]=true;// modifies the first bit through bitset::refencestd::cout<<"After setting bit 0, the bitset holds "<< b1 <<'\n';}

Output:

b1[0]: 0 b1[1]: 1 b1[2]: 0 b1[3]: 1 b1[4]: 0 b1[5]: 1 b1[6]: 0 b1[7]: 0 After setting bit 0, bitset is 00101011

Vedi anche

test	accede specifico bit Original: accesses specific bit The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)