std::array::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)

 

Contenitori libreria

array (C++11)

vector

deque

forward_list (C++11)

list

set

multiset

map

multimap

unordered_set (C++11)

unordered_multiset (C++11)

unordered_map (C++11)

unordered_multimap (C++11)

stack

queue

priority_queue

 

std::array

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.

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.

array::at

array::operator[]

array::front

array::back

array::data

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

array::begin array::cbegin

array::end array::cend

array::rbegin array::crbegin

array::rend array::crend

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.

array::empty

array::size

array::max_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.

array::fill

array::swap

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.

get

swap

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.

tuple_size

tuple_element

 

reference       operator[]( size_type pos );		(dal C++11)
const_reference operator[]( size_type pos )const;		(dal C++11)

Restituisce un riferimento per l'elemento in pos posizione specificata. Nessun controllo dei limiti viene eseguito.

Original:

Returns a reference to the element at specified location pos. No bounds checking is performed.

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Parametri

pos

-

posizione dell'elemento di ritornare Original: position of the element 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

riferimento per l'elemento richiesto

Original:

reference to the requested element

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Complessità

Constant

Original:

Constant

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Esempio

Il codice seguente utilizza operator[] leggere e scrivere in un std::array<int>:

Original:

The following code uses operator[] read from and write to a std::array<int>:

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#include <array>#include <iostream>   int main(){std::array<int> numbers {2, 4, 6, 8};   std::cout<<"Second element: "<< numbers[1]<<'\n';   numbers[0]=5;   std::cout<<"All numbers:";for(auto i : numbers){std::cout<<' '<< i;}std::cout<<'\n';}

Output:

Second element: 4 All numbers: 5 4 6 8

Vedi anche

at	accedere elemento specificato con verifica dei limiti Original: access specified element with bounds checking The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)