std::adjacent_difference
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Defined in header <numeric> | ||
template<class InputIt, class OutputIt > OutputIt adjacent_difference( InputIt first, InputIt last, | (1) | |
template<class InputIt, class OutputIt, class BinaryOperation > OutputIt adjacent_difference( InputIt first, InputIt last, | (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
.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.
同等の操作:
Original:
Equivalent operation:
The text has been machine-translated via Google Translate.
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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 The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
d_first | - | 目的の範囲の始まり Original: the beginning of 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. |
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&. |
型の要件 | ||
-InputIt 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。 |
[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 operationThe text has been machine-translated via Google Translate.
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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]例
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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このコードを実行します
#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 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) | |
要素の範囲をまとめている Original: sums up a range of 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) |