std::multimap<Key,T,Compare,Allocator>:: size
From cppreference.net
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std::multimap
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size_type size
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const
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(C++11以降 noexcept)
(C++26以降 constexpr) |
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コンテナ内の要素数を返します。
目次 |
戻り値
std:: distance ( begin ( ) , end ( ) )
計算量
定数。
例
このコードを実行
#include <cassert> #include <map> int main() { std::multimap<int, char> nums{{1, 'a'}, {1, 'b'}, {2, 'c'}, {2, 'd'}}; assert(nums.size() == 4); }
関連項目
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コンテナが空かどうかをチェックする
(public member function) |
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可能な最大要素数を返す
(public member function) |
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(C++17)
(C++20)
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コンテナまたは配列のサイズを返す
(function template) |