std::set::size

 

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::set

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.

set::set

set::~set

set::operator=

set::get_allocator

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.

set::begin set::cbegin (C++11)

set::end set::cend (C++11)

set::rbegin set::crbegin (C++11)

set::rend set::crend (C++11)

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.

set::empty

set::size

set::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.

set::clear

set::insert

set::emplace (C++11)

set::emplace_hint (C++11)

set::erase

set::swap

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

set::count

set::find

set::equal_range

set::lower_bound

set::upper_bound

オブザーバー Original: Observers The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

set::key_comp

set::value_comp

 

size_type size() const;

Returns the number of elements in the container, i.e. std::distance(begin(), end()).

パラメータ

（なし）

Original:

(none)

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値を返します

コンテナ内の要素の数

Original:

the number of elements in the container

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例外

noexcept specification:  

noexcept

  (C + + 11以来)

複雑

Constant

例

The following code uses size to display the number of elements in a std::set<int>:

#include <set>
#include <iostream>
 
int main()
{
    std::set<int> nums {1, 3, 5, 7};
 
    std::cout << "nums contains " << nums.size() << " elements.\n";
}

Output:

nums contains 4 elements.

も参照してください

empty	コンテナが空であるかどうかをチェックします (パブリックメンバ関数)
max_size	要素の最大数を返します Original: returns the maximum possible number of elements 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)