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std::adjacent_difference

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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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adjacent_difference
partial_sum
Cライブラリ
Original:
C library
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Defined in header <numeric>
template<class InputIt, class OutputIt >

OutputIt adjacent_difference( InputIt first, InputIt last,

                                    OutputIt d_first );
(1)
template<class InputIt, class OutputIt, class BinaryOperation >

OutputIt adjacent_difference( InputIt first, InputIt last,
                                    OutputIt d_first,

                                    BinaryOperation op );
(2)
第二および範囲[first, last)の各要素の隣接ペアの最初の違いを計算し、d_first + 1で範囲の先頭に書き込みます。 firstの未修正のコピーがd_firstに書き込まれます。最初のバージョンの違いを計算するoperator-使用し、2番目のバージョンは、指定されたバイナリop機能を使用しています.
Original:
Computes the differences between the second and the first of each adjacent pair of elements of the range [first, last) and writes them to the range beginning at d_first + 1. Unmodified copy of first is written to d_first. The first version uses operator- to calculate the differences, the second version uses the given binary function op.
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同等の操作:
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Equivalent operation:
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*(d_first)=*first;*(d_first+1)=(*first+1)-*(first);*(d_first+2)=(*first+2)-*(first+1);*(d_first+3)=(*first+3)-*(first+2); ...

目次

[編集]パラメータ

first, last -
要素の範囲
Original:
the range of elements
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d_first -
目的の範囲の始まり
Original:
the beginning of the destination range
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op - binary operation function object that will be applied.

The signature of the function should be equivalent to the following:

 Ret fun(const Type1 &a, const Type2 &b);

The signature does not need to have const&.
 Type1及び Type2はどちらも型iterator_traits<InputIt>::value_typeから暗黙型変換可能な型でなければなりません. The type  Ret must be such that an object of type OutputIt can be dereferenced and assigned a value of type  Ret. ​

型の要件
-
InputItInputIterator

の要求を満足しなければなりません。

-
OutputItOutputIterator

の要求を満足しなければなりません。

[編集]値を返します

それは書かれた最後の要素過去の要素への.
Original:
It to the element past the last element written.
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[編集]複雑性

二項演算の正確(last - first) - 1アプリケーション
Original:
Exactly (last - first) - 1 applications of the binary operation
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[編集]可能な実装

First version
template<class InputIt, class OutputIt> OutputIt adjacent_difference(InputIt first, InputIt last, OutputIt d_first){if(first == last)return d_first;   typedeftypenamestd::iterator_traits<InputIt>::value_type value_t; value_t acc =*first;*d_first = acc;while(++first != last){ value_t val =*first;*++d_first = val - acc; acc =std::move(val);}return++d_first;}
Second version
template<class InputIt, class T, class BinaryOperation> OutputIt adjacent_difference(InputIt first, InputIt last, OutputIt d_first, BinaryOperation op){if(first == last)return d_first;   typedeftypenamestd::iterator_traits<InputIt>::value_type value_t; value_t acc =*first;*d_first = acc;while(++first != last){ value_t val =*first;*++d_first = op(val, acc); acc =std::move(val);}return++d_first;}

[編集]

次のコードは、番号2の繰り返しにさえ数字の配列を変換し、一連のフィボナッチの数列へのもののシーケンスに変換.
Original:
The following code converts a sequence of even numbers to repetitions of the number 2 and converts a sequence of ones to a sequence of Fibonacci numbers.
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#include <numeric>#include <vector>#include <iostream>#include <functional>int main(){std::vector<int> v{2, 4, 6, 8, 10, 12, 14, 16, 18, 20}; std::adjacent_difference(v.begin(), v.end(), v.begin());   for(auto n: v){std::cout<< n <<' ';}std::cout<<'\n';   v ={1, 1, 1, 1, 1, 1, 1, 1, 1, 1}; std::adjacent_difference(v.begin(), v.end()-1, v.begin()+1, std::plus<int>()   for(auto n: v){std::cout<< n <<' ';}std::cout<<'\n';}

出力:

2 2 2 2 2 2 2 2 2 2 1 1 2 3 5 8 13 21 34 55

[編集]参照

要素の範囲の部分和を計算します
Original:
computes the partial sum of a range of elements
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(関数テンプレート)[edit]
要素の範囲をまとめている
Original:
sums up a range of elements
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(関数テンプレート)[edit]
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