std::array::back

 

C++

言語

コンセプト

ユーティリティライブラリ

ストリングスライブラリ

コンテナライブラリ

アルゴリズムライブラリ

イテレータライブラリ

ニューメリックスライブラリ

入力/出力ライブラリ

ローカライゼーションライブラリ

正規表現ライブラリ (C++11)

アトミック操作ライブラリ (C++11)

スレッドのサポートライブラリ (C++11)

 

コンテナライブラリ

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

メンバ関数 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.

要素アクセスの循環参照を解除するために使用されている 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

イテレータ 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

容量 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

修飾子 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

非メンバ関数 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

ヘルパークラス 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 back();		(C++11およびそれ以降)
const_reference back() const;		(C++11およびそれ以降)

コンテナ内の最後の要素への参照を返します.

Original:

Returns reference to the last element in the container.

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

空の容器にbackを呼び出すと、定義されていません.

Original:

Calling back on an empty container is undefined.

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

パラメータ

（なし）

Original:

(none)

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

値を返します

最後の要素への参照

Original:

reference to the last element

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

複雑

定数

Original:

Constant

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

ノート

コンテナc、発現return c.back();は{ auto tmp = c.end(); --tmp; return *tmp; }に相当します

Original:

For a container c, the expression return c.back(); is equivalent to { auto tmp = c.end(); --tmp; return *tmp; }

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

例

次のコードは、backの最後の要素を表示するためにstd::array<char>を使用しています

Original:

The following code uses back to display the last element of a std::array<char>:

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

このコードを実行します

#include <array>
#include <iostream>
 
int main()
{
    std::array<char> letters {'o', 'm', 'g', 'w', 't', 'f'};
 
    if (!letters.empty()) {
        std::cout << "The last character is: " << letters.back() << '\n';
    }  
}

出力:

The last character is f

も参照してください

front	最初の要素にアクセスします Original: access the first element The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (パブリックメンバ関数)