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std::multimap::size

提供: cppreference.com
< cpp‎ | container‎ | multimap

 
 
 
std::multimap
メンバ関数
Original:
Member functions
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multimap::multimap
multimap::~multimap
multimap::operator=
multimap::get_allocator
イテレータ
Original:
Iterators
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multimap::begin
multimap::cbegin

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

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

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

(C++11)
容量
Original:
Capacity
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multimap::erase
multimap::size
multimap::max_size
修飾子
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Modifiers
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multimap::clear
multimap::insert
multimap::emplace(C++11)
multimap::emplace_hint(C++11)
multimap::erase
multimap::swap
ルック
Original:
Lookup
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multimap::count
multimap::find
multimap::equal_range
multimap::lower_bound
multimap::upper_bound
オブザーバー
Original:
Observers
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multimap::key_comp
multimap::value_comp
 
size_type size() const;

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

目次

[編集] パラメータ

(なし)
Original:
(none)
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[編集] 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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[編集] 例外

noexcept specification:  
noexcept
  (C + + 11以来)

[編集] 複雑

Constant

[編集]

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

#include <multimap>
#include <iostream>
 
int main()
{
    std::multimap<int, char> nums {{1, 'a'}, {3, 'b'}, {5, 'c'}, {7, 'd'}};
 
    std::cout << "nums contains " << nums.size() << " elements.\n";
}

Output:

nums contains 4 elements.

[編集] も参照してください

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) [edit]
要素の最大数を返します
Original:
returns the maximum possible number of elements
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(パブリックメンバ関数) [edit]