std::partial_sort_copy
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Defined in header <algorithm>
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template< class InputIt, class RandomIt > RandomIt partial_sort_copy( InputIt first, InputIt last, |
(1) | |
template< class InputIt, class RandomIt, class Compare > RandomIt partial_sort_copy( InputIt first, InputIt last, |
(2) | |
を昇順で並べ替え範囲
[first, last)
内の要素のいくつかを示しています。要素のほとんどd_first - d_lastで範囲[d_first, d_first + n)
に移動してから、ソートされています。 n
ソート(n = min(last - first, d_last - d_first))に要素の数です。等しい要素の順序は保持される保証はありません。最初のバージョンは、要素を比較するoperator<使用して、2番目のバージョンは、指定された比較関数comp
を使用しています.Original:
Sorts some of the elements in the range
[first, last)
in ascending order. At most d_first - d_last of the elements are moved to the range [d_first, d_first + n)
and then sorted. n
is the number of elements to sort (n = min(last - first, d_last - d_first)). The order of equal elements is not guaranteed to be preserved. The first version uses operator< to compare the elements, the second version uses the given comparison function comp
.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
目次 |
[編集] パラメータ
first, last | - | ソートする要素の範囲
Original: the range of elements to sort The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
d_first, d_last | - | 貼り付け先の範囲を定義するランダムアクセス反復子
Original: random access iterators defining the destination range 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 |
型の要件 | ||
-InputIt は InputIterator
の要求を満足しなければなりません。 | ||
-RandomIt は ValueSwappable and RandomAccessIterator 。
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-The type of dereferenced RandomIt must meet the requirements of MoveAssignable and MoveConstructible .
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[編集] 値を返します
ソートされた範囲の上限を定義する要素を指すイテレータ、すなわちd_first + min(last - first, d_last - d_first).
Original:
an iterator to the element defining the upper boundary of the sorted range, i.e. d_first + min(last - first, d_last - d_first).
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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[編集] 複雑
O(N·log(min(D,N))、N = std::distance(first, last)のD = std::distance(d_first, d_last)、
cmp
アプリケーション.Original:
O(N·log(min(D,N)), where N = std::distance(first, last), D = std::distance(d_first, d_last) applications of
cmp
.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
[編集] 例
次のコードをソートする整数のベクトルと小さく、より大きなベクトルにそれらをコピー.
Original:
The following code sorts an vector of integers and copies them into a smaller and a larger vector.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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このコードを実行します
#include <algorithm> #include <vector> #include <functional> #include <iostream> int main() { std::vector<int> v0{4, 2, 5, 1, 3}; std::vector<int> v1{10, 11, 12}; std::vector<int> v2{10, 11, 12, 13, 14, 15, 16}; std::vector<int>::iterator it; it = std::partial_sort_copy(v0.begin(), v0.end(), v1.begin(), v1.end()); std::cout << "Writing to the smaller vector in ascending order gives: "; for (int a : v1) { std::cout << a << " "; } std::cout << '\n'; if(it == v1.end()) std::cout << "The return value is the end iterator\n"; it = std::partial_sort_copy(v0.begin(), v0.end(), v2.begin(), v2.end(), std::greater<int>()); std::cout << "Writing to the larger vector in descending order gives: "; for (int a : v2) { std::cout << a << " "; } std::cout << '\n' << "The return value is the iterator to " << *it << '\n'; }
出力:
Writing to the smaller vector in ascending order gives: 1 2 3 The return value is the end iterator Writing to the larger vector in descending order gives: 5 4 3 2 1 15 16 The return value is the iterator to 15
[編集] も参照してください
ソート範囲の最初のN要素 Original: sorts the first N elements of a range The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (関数テンプレート) | |
昇順にソートする範囲 Original: sorts a range into ascending order The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (関数テンプレート) | |
ソートされた範囲の要素を等しい要素間の順序を維持しながら Original: sorts a range of elements while preserving order between equal elements The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (関数テンプレート) |