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std::rotate

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< cpp‎ | algorithm

 
 
アルゴリズムライブラリ
機能します
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Functions
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シーケンス動作を非改変
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Non-modifying sequence operations
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シーケンス動作を変更する
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Modifying sequence operations
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操作を仕切る
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Partitioning operations
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(ソートされた範囲で)ソート操作
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Sorting operations (on sorted ranges)
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バイナリ検索操作(ソート範囲で)
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Binary search operations (on sorted ranges)
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(ソートされた範囲で)操作を設定します
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Set operations (on sorted ranges)
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ヒープ操作
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Heap operations
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最小値/最大値操作
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Minimum/maximum operations
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数値演算
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Numeric operations
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Cライブラリ
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C library
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Defined in header <algorithm>
template<class ForwardIt >

void rotate( ForwardIt first, ForwardIt n_first, ForwardIt last );
template<class ForwardIt >

ForwardIt rotate( ForwardIt first, ForwardIt n_first, ForwardIt last );
(C++11以前)

(C++11およびそれ以降)
スワップは、要素[first, last)は新しい範囲の最初の要素となり、n_first最後の要素となるように範囲n_first - 1内の要素、.
Original:
Swaps the elements in the range [first, last) in such a way, that the element n_first becomes the first element of the new range and n_first - 1 becomes the last element.
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目次

[編集]パラメータ

first, last -
回転させるための要素の範囲
Original:
the range of elements to rotate
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n_first -
新しい範囲の先頭に移動する要素
Original:
the element to move to the beginning of the new range
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型の要件
-
ForwardItValueSwappable and ForwardIterator
-
The type of dereferenced ForwardIt must meet the requirements of MoveAssignable and MoveConstructible.

[編集]値を返します

(なし)(C++11以前)
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(none) (C++11以前)
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first + (last - n_first)(C++11およびそれ以降)反復等しい
Original:
The iterator equal to first + (last - n_first)(C++11およびそれ以降)
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[編集]複雑性

firstlastとの間の距離の線形
Original:
linear in the distance between first and last
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[編集]可能な実装

template<class ForwardIt>void rotate(ForwardIt first, ForwardIt n_first, ForwardIt last){ ForwardIt next = n_first;while(first != next){std::swap(*first++, *next++);if(next == last){ next = n_first;}elseif(first == n_first){ n_first = next;}}}

[編集]

はstd :: rotateは、多くのアルゴリズムに共通のビルディング·ブロックです。この例では、挿入ソートを示し、C + +
Original:
std::rotate is a common building block in many algorithms. This example demonstrates insertion sort in C++
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#include <vector>#include <iostream>#include <algorithm>   int main(){std::vector<int> v{2, 4, 2, 0, 5, 10, 7, 3, 7, 1};   std::cout<<"before sort: ";for(int n: v)std::cout<< n <<' ';std::cout<<'\n';   // insertion sortfor(auto i = v.begin(); i != v.end();++i){ std::rotate(std::upper_bound(v.begin(), i, *i), i, i+1);}   std::cout<<"after sort: ";for(int n: v)std::cout<< n <<' ';std::cout<<'\n';   // simple rotation to the left std::rotate(v.begin(), v.begin()+1, v.end());   std::cout<<"simple rotate left  : ";for(int n: v)std::cout<< n <<' ';std::cout<<'\n';   // simple rotation to the right std::rotate(v.rbegin(), v.rbegin()+1, v.rend());   std::cout<<"simple rotate right : ";for(int n: v)std::cout<< n <<' ';std::cout<<'\n';   }

出力:

before sort: 2 4 2 0 5 10 7 3 7 1 after sort: 0 1 2 2 3 4 5 7 7 10 simple rotate left : 1 2 2 3 4 5 7 7 10 0 simple rotate right: 0 1 2 2 3 4 5 7 7 10

[編集]参照

コピーと要素の範囲を回転させます
Original:
copies and rotate a range of elements
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