std::equal
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Defined in header <algorithm>
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template< class InputIt1, class InputIt2 > bool equal( InputIt1 first1, InputIt1 last1, |
(1) | |
template< class InputIt1, class InputIt2, class BinaryPredicate > bool equal( InputIt1 first1, InputIt1 last1, |
(2) | |
[first1, last1)
によって定義され、別のfirst2
始まる。関数の最初のバージョンは要素を比較するoperator==使用し、2番目は、指定されたバイナリ述語p
を使用しています.[first1, last1)
and another starting at first2
. The first version of the function uses operator== to compare the elements, the second uses the given binary predicate p
.You can help to correct and verify the translation. Click here for instructions.
目次 |
[編集] パラメータ
first1, last1 | - | 比較する最初の要素の範囲
Original: the first range of the elements to compare The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
first2 | - | 比較する要素の第2の範囲の始まり
Original: beginning of the second range of the elements to compare The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
p | - | binary predicate which returns true if the elements should be treated as equal. The signature of the predicate function should be equivalent to the following: bool pred(const Type1 &a, const Type2 &b); The signature does not need to have const &, but the function must not modify the objects passed to it. |
Type requirements | ||
-InputIt1, InputIt2 must meet the requirements of InputIterator .
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[編集] 値を返します
You can help to correct and verify the translation. Click here for instructions.
[編集] ノート
std::equal
はstd::unordered_set、std::unordered_multiset、std::unordered_map、またはstd::unordered_multimapからイテレータによって形成された範囲を比較するために使用することはできません. std::equal
may not be used to compare the ranges formed by the iterators from std::unordered_set, std::unordered_multiset, std::unordered_map, or std::unordered_multimap because the order in which the elements are stored in those containers may be different even if the two containers store the same elements. 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] 複雑
last1
- 述語のfirst1
アプリケーションlast1
- first1
applications of the predicateYou can help to correct and verify the translation. Click here for instructions.
[編集] 可能な実装
First version |
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template<class InputIt1, class InputIt2> bool equal(InputIt1 first1, InputIt1 last1, InputIt2 first2) { for (; first1 != last1; ++first1, ++first2) { if (!(*first1 == *first2)) { return false; } } return true; } |
Second version |
template<class InputIt1, class InputIt2, class BinaryPredicate> bool equal(InputIt1 first1, InputIt1 last1, InputIt2 first2, BinaryPredicate p) { for (; first1 != last1; ++first1, ++first2) { if (!p(*first1, *first2)) { return false; } } return true; } |
[編集] 例
You can help to correct and verify the translation. Click here for instructions.
#include <iostream> #include <algorithm> #include <string> void test(const std::string& s) { if(std::equal(s.begin(), s.begin() + s.size()/2, s.rbegin())) { std::cout << "\"" << s << "\" is a palindrome\n"; } else { std::cout << "\"" << s << "\" is not palindrome\n"; } } int main() { test("radar"); test("hello"); }
Output:
"radar" is a palindrome "hello" is not palindrome
(C++11) |
特定の条件を満たす最初の要素を検索します Original: finds the first element satisfying specific criteria 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) |
1範囲が別のより辞書式に小さい場合はtrueを返します Original: returns true if one range is lexicographically less than another 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) | |
2の範囲が異なる最初の位置を見つけます Original: finds the first position where two ranges differ 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) | |
searches for a range of elements (関数テンプレート) |