std::set_intersection

 

C++

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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)

 

アルゴリズムライブラリ

機能します Original: Functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
シーケンス動作を非改変 Original: Non-modifying sequence operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
all_of any_of none_of (C++11) (C++11) (C++11) for_each count count_if mismatch equal	find find_if find_if_not (C++11) find_end find_first_of adjacent_find search search_n
シーケンス動作を変更する Original: Modifying sequence operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
copy copy_if (C++11) copy_n (C++11) copy_backward move (C++11) move_backward (C++11) fill fill_n transform generate generate_n remove remove_if remove_copy remove_copy_if	replace replace_if replace_copy replace_copy_if swap swap_ranges iter_swap reverse reverse_copy rotate rotate_copy random_shuffle shuffle   (C++11) unique unique_copy
操作を仕切る Original: Partitioning operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
is_partitioned (C++11) partition partition_copy (C++11)	stable_partition partition_point (C++11)
（ソートされた範囲で）ソート操作 Original: Sorting operations (on sorted ranges) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
is_sorted (C++11) is_sorted_until (C++11) sort	partial_sort partial_sort_copy stable_sort nth_element
バイナリ検索操作（ソート範囲で） Original: Binary search operations (on sorted ranges) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
lower_bound upper_bound	binary_search equal_range
（ソートされた範囲で）操作を設定します Original: Set operations (on sorted ranges) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
merge inplace_merge includes	set_difference set_intersection set_symmetric_difference set_union
ヒープ操作 Original: Heap operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
is_heap is_heap_until (C++11) make_heap	push_heap pop_heap sort_heap
最小値/最大値操作 Original: Minimum/maximum operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
max max_element min min_element minmax (C++11) minmax_element (C++11)	lexicographical_compare is_permutation (C++11) next_permutation prev_permutation
数値演算 Original: Numeric operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
iota (C++11) accumulate inner_product	adjacent_difference partial_sum
Cライブラリ Original: C library The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
qsort	bsearch

 

Defined in header <algorithm>
template<class InputIt1, class InputIt2, class OutputIt > OutputIt set_intersection( InputIt1 first1, InputIt1 last1,                            InputIt2 first2, InputIt2 last2,                            OutputIt d_first );	(1)
template<class InputIt1, class InputIt2,           class OutputIt, class Compare > OutputIt set_intersection( InputIt1 first1, InputIt1 last1,                            InputIt2 first2, InputIt2 last2,                            OutputIt d_first, Compare comp );	(2)

両方のソート範囲で発見された要素から成るd_firstでソートされた範囲の先頭を構築[first1, last1)と[first2, last2)。最初のバージョンでは、両方の入力がoperator<でソートされている範囲では、2番目のバージョンは、それらが与えられた比較関数compでソートされることを想定して期待しています。いくつかの要素がmと[first1, last1)回nで[first2, last2)時間が見つかった場合、最初std::min(m, n)要素は最初の範囲から先のセル範囲にコピーされます。同等の要素の順序は保持されます。結果の範囲は入力レンジのいずれかと重複することはできません.

Original:

Constructs a sorted range beginning at d_first consisting of elements that are found in both sorted ranges [first1, last1) and [first2, last2). The first version expects both input ranges to be sorted with operator<, the second version expects them to be sorted with the given comparison function comp. If some element is found m times in [first1, last1) and n times in [first2, last2), the first std::min(m, n) elements will be copied from the first range to the destination range. The order of equivalent elements is preserved. The resulting range cannot overlap with either of the input ranges.

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パラメータ

first1, last1	-	検討する要素の最初の範囲 Original: the first range of elements to examine The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
first2, last2	-	検討する要素の第2の範囲 Original: the second range of elements to examine The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
comp	-	比較関数. 最初の値が二つ目の値より小さい 場合、 ​trueを返します. 比較関数のシグネチャは以下と同等でなければなりません.  bool cmp(const Type1 &a, const Type2 &b); シグネチャはconstを含まなくても構いませんが, 比較関数は渡されたオブジェクトを変更してはなりません. The types Type1 and Type2 must be such that objects of types InputIt1 and InputIt2 can be dereferenced and then implicitly converted to Type1 and Type2 respectively. ​
型の要件
- InputIt1 は InputIterator の要求を満足しなければなりません。
- InputIt2 は InputIterator の要求を満足しなければなりません。
- OutputIt は OutputIterator の要求を満足しなければなりません。

値を返します

構築範囲の終わり過去イテレータ.

Original:

Iterator past the end of the constructed range.

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複雑性

最も2·(N₁+N₂-1)の比較で、どこN₁=std::distance(first1, last1)とN₂=std::distance(first2, last2).

Original:

At most 2·(N₁+N₂-1) comparisons, where N₁=std::distance(first1, last1) and N₂=std::distance(first2, last2).

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可能な実装

First version
template<class InputIt1, class InputIt2, class OutputIt> OutputIt set_intersection(InputIt1 first1, InputIt1 last1, InputIt2 first2, InputIt2 last2, OutputIt d_first){while(first1 != last1 && first2 != last2){if(*first1 <*first2){++first1;}else{if(!(*first2 <*first1)){*d_first++=*first1++;}++first2;}}return d_first;}
Second version
template<class InputIt1, class InputIt2, class OutputIt, class Compare> OutputIt set_intersection(InputIt1 first1, InputIt1 last1, InputIt2 first2, InputIt2 last2, OutputIt d_first, Compare comp){while(first1 != last1 && first2 != last2){if(comp(*first1, *first2)){++first1;}else{if(!comp(*first2, *first1)){*d_first++=*first1++;}++first2;}}return d_first;}

例

このコードを実行します

#include <iostream>#include <vector>#include <algorithm>#include <iterator>int main(){std::vector<int> v1{1,2,3,4,5,6,7,8};std::vector<int> v2{5, 7, 9,10};std::sort(v1.begin(), v1.end());std::sort(v2.begin(), v2.end());   std::vector<int> v_intersection;   std::set_intersection(v1.begin(), v1.end(), v2.begin(), v2.end(), std::back_inserter(v_intersection));for(int n : v_intersection)std::cout<< n <<' ';}

出力:

5 7

参照

set_union	2つの集合の和を計算します。 (関数テンプレート)