std :: search和std :: find_first_of之间的区别 [英] Difference between std::search and std::find_first_of

问题描述

我正在尝试掌握std::search和std::find_first_of

它们具有相同的原型:

template <class ForwardIterator1, class ForwardIterator2>
   ForwardIterator1 find_first_of (ForwardIterator1 first1, ForwardIterator1 last1,
                                   ForwardIterator2 first2, ForwardIterator2 last2);

template <class ForwardIterator1, class ForwardIterator2, class BinaryPredicate>
   ForwardIterator1 find_first_of (ForwardIterator1 first1, ForwardIterator1 last1,
                                   ForwardIterator2 first2, ForwardIterator2 last2,
                                   BinaryPredicate pred);

template <class ForwardIterator1, class ForwardIterator2>
   ForwardIterator1 search (ForwardIterator1 first1, ForwardIterator1 last1,
                            ForwardIterator2 first2, ForwardIterator2 last2);

template <class ForwardIterator1, class ForwardIterator2, class BinaryPredicate>
   ForwardIterator1 search (ForwardIterator1 first1, ForwardIterator1 last1,
                            ForwardIterator2 first2, ForwardIterator2 last2,
                            BinaryPredicate pred);

它们都返回相同的东西:一个迭代器，迭代到[first1，last1)内部序列[first2，last2)的第一次出现. (使用相等性或二进制谓词)

They both return the same thing: An iterator to the first occurrence of the sequence [first2, last2) inside [first1, last1). (using equality, or a binary predicate)

那有什么区别?我错了吗?

So what is the difference ? Am I wrong ?

推荐答案

区别在于std::search搜索另一个范围内的元素的整个范围，而std::find_first_of搜索<来自另一个范围内的一个范围内的em> single 元素.

The difference is that std::search searches for a whole range of elements within another range, while std::find_first_of searches for a single element from a range within another range.

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