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std::copy_if
template
OutputIterator copy_if (InputIterator first, InputIterator last,
OutputIterator result, UnaryPredicate pred);
Copy certain elements of range
Copies the elements in the range [first,last) for which pred returns true to the range beginning at result.
将符合要求的元素（对元素调用pred返回true的元素）复制到目标数组中。
The behavior of this function template is equivalent to:
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template <class InputIterator, class OutputIterator, class UnaryPredicate>
OutputIterator copy_if (InputIterator first, InputIterator last,
OutputIterator result, UnaryPredicate pred)
{
while (first!=last) {
if (pred(*first)) {
*result = *first;
++result;
}
++first;
}
return result;
} |
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Parameters
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