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Containers library
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operators (std::array)
operators (std::deque)
operators (std::forward_list)
operators (std::list)
operators (std::map)
operators (std::multimap)
operators (std::multiset)
operators (std::queue)
operators (std::set)
operators (std::stack)
operators (std::unordered_map)
operators (std::unordered_multimap)
operators (std::unordered_multiset)
operators (std::unordered_set)
operators (std::vector)
remove_if
remove_if
std::array
std::array::at
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std::array::begin
std::array::cbegin
std::array::cend
std::array::crbegin
std::array::crend
std::array::data
std::array::empty
std::array::end
std::array::fill
std::array::front
std::array::max_size
std::array::operator[]
std::array::rbegin
std::array::rend
std::array::size
std::array::swap
std::deque
std::deque::assign
std::deque::at
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std::deque::begin
std::deque::cbegin
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std::deque::clear
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std::deque::get_allocator
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std::deque::operator[]
std::deque::pop_back
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std::forward_list
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std::forward_list::forward_list
std::forward_list::front
std::forward_list::get_allocator
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std::forward_list::max_size
std::forward_list::merge
std::forward_list::pop_front
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std::forward_list::unique
std::get(std::array)
std::hash
std::list
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std::list::insert
std::list::list
std::list::max_size
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std::list::push_front
std::list::rbegin
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std::list::resize
std::list::reverse
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std::map
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std::map::emplace
std::map::emplace_hint
std::map::empty
std::map::end
std::map::equal_range
std::map::erase
std::map::extract
std::map::find
std::map::get_allocator
std::map::insert
std::map::insert_or_assign
std::map::key_comp
std::map::lower_bound
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std::map::max_size
std::map::merge
std::map::operator[]
std::map::rbegin
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std::map::size
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std::map::try_emplace
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std::multimap
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std::multimap::empty
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std::multimap::equal_range
std::multimap::erase
std::multimap::extract
std::multimap::find
std::multimap::get_allocator
std::multimap::insert
std::multimap::key_comp
std::multimap::lower_bound
std::multimap::max_size
std::multimap::merge
std::multimap::multimap
std::multimap::rbegin
std::multimap::rend
std::multimap::size
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std::multimap::upper_bound
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std::multiset
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std::multiset::emplace_hint
std::multiset::empty
std::multiset::end
std::multiset::equal_range
std::multiset::erase
std::multiset::extract
std::multiset::find
std::multiset::get_allocator
std::multiset::insert
std::multiset::key_comp
std::multiset::lower_bound
std::multiset::max_size
std::multiset::merge
std::multiset::multiset
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std::multiset::rend
std::multiset::size
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std::multiset::upper_bound
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std::queue
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std::queue::size
std::queue::swap
std::set
std::set::begin
std::set::cbegin
std::set::cend
std::set::clear
std::set::count
std::set::crbegin
std::set::crend
std::set::emplace
std::set::emplace_hint
std::set::empty
std::set::end
std::set::equal_range
std::set::erase
std::set::extract
std::set::find
std::set::get_allocator
std::set::insert
std::set::key_comp
std::set::lower_bound
std::set::max_size
std::set::merge
std::set::rbegin
std::set::rend
std::set::set
std::set::size
std::set::swap
std::set::upper_bound
std::set::value_comp
std::stack
std::stack::emplace
std::stack::empty
std::stack::pop
std::stack::push
std::stack::size
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std::stack::top
std::swap(std::array)
std::swap(std::deque)
std::swap(std::forward_list)
std::swap(std::list)
std::swap(std::map)
std::swap(std::multimap)
std::swap(std::multiset)
std::swap(std::priority_queue)
std::swap(std::queue)
std::swap(std::set)
std::swap(std::stack)
std::swap(std::unordered_map)
std::swap(std::unordered_multimap)
std::swap(std::unordered_multiset)
std::swap(std::unordered_set)
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std::tuple_element<std::array>
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std::unordered_map
std::unordered_map::at
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std::unordered_map::begin(int)
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std::unordered_map::cend
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std::unordered_map::count
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std::unordered_map::equal_range
std::unordered_map::erase
std::unordered_map::extract
std::unordered_map::find
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std::unordered_map::hash_function
std::unordered_map::insert
std::unordered_map::insert_or_assign
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std::unordered_map::load_factor
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std::unordered_multimap::empty
std::unordered_multimap::end
std::unordered_multimap::end(int)
std::unordered_multimap::equal_range
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std::unordered_multimap::find
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std::unordered_multimap::hash_function
std::unordered_multimap::insert
std::unordered_multimap::key_eq
std::unordered_multimap::load_factor
std::unordered_multimap::max_bucket_count
std::unordered_multimap::max_load_factor
std::unordered_multimap::max_size
std::unordered_multimap::merge
std::unordered_multimap::rehash
std::unordered_multimap::reserve
std::unordered_multimap::size
std::unordered_multimap::swap
std::unordered_multimap::unordered_multimap
std::unordered_multiset
std::unordered_multiset::begin
std::unordered_multiset::begin(int)
std::unordered_multiset::bucket
std::unordered_multiset::bucket_count
std::unordered_multiset::bucket_size
std::unordered_multiset::cbegin
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std::unordered_multiset::cend
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std::unordered_multiset::clear
std::unordered_multiset::count
std::unordered_multiset::emplace
std::unordered_multiset::emplace_hint
std::unordered_multiset::empty
std::unordered_multiset::end
std::unordered_multiset::end(int)
std::unordered_multiset::equal_range
std::unordered_multiset::erase
std::unordered_multiset::extract
std::unordered_multiset::get_allocator
std::unordered_multiset::hash_function
std::unordered_multiset::insert
std::unordered_multiset::key_eq
std::unordered_multiset::load_factor
std::unordered_multiset::max_bucket_count
std::unordered_multiset::max_load_factor
std::unordered_multiset::max_size
std::unordered_multiset::merge
std::unordered_multiset::rehash
std::unordered_multiset::reserve
std::unordered_multiset::size
std::unordered_multiset::swap
std::unordered_multiset::unordered_multiset
std::unordered_set
std::unordered_set::begin
std::unordered_set::begin(int)
std::unordered_set::bucket
std::unordered_set::bucket_count
std::unordered_set::bucket_size
std::unordered_set::cbegin
std::unordered_set::cbegin
std::unordered_set::cend
std::unordered_set::cend
std::unordered_set::clear
std::unordered_set::count
std::unordered_set::emplace
std::unordered_set::emplace_hint
std::unordered_set::empty
std::unordered_set::end
std::unordered_set::end(int)
std::unordered_set::equal_range
std::unordered_set::erase
std::unordered_set::extract
std::unordered_set::find
std::unordered_set::get_allocator
std::unordered_set::hash_function
std::unordered_set::insert
std::unordered_set::key_eq
std::unordered_set::load_factor
std::unordered_set::max_bucket_count
std::unordered_set::max_load_factor
std::unordered_set::max_size
std::unordered_set::merge
std::unordered_set::rehash
std::unordered_set::reserve
std::unordered_set::size
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std::unordered_set::unordered_set
std::uses_allocator<std::priority_queue>
std::uses_allocator<std::queue>
std::uses_allocator<std::stack>
std::vector
std::vector::assign
std::vector::at
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std::vector::begin
std::vector::capacity
std::vector::cbegin
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std::vector::clear
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std::vector::data
std::vector::emplace
std::vector::emplace_back
std::vector::empty
std::vector::end
std::vector::erase
std::vector::front
std::vector::get_allocator
std::vector::insert
std::vector::max_size
std::vector::operator[]
std::vector::pop_back
std::vector::push_back
std::vector::rbegin
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std::vector::reserve
std::vector::resize
std::vector::shrink_to_fit
std::vector::size
std::vector::swap
std::vector::vector
std::vector<bool>
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std::vector<bool>::reference
std::vector<bool>::swap
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std::unordered_multiset::find

STD：无序[医]多集：：查找

iterator find( const Key& key (1)​
const_iterator find( const Key& key ) const;(2)​

1，2%29找到一个密钥相当于key...

参数

key-key value of the element to search for

返回值

元素的迭代器，该元素的密钥等价于key如果没有找到这样的元素，请参阅end()返回%29迭代器。

复杂性

常量，最坏情况下，容器的大小是线性的。

例

二次

#include <iostream>
#include <unordered_set>
 
int main()
{  
    std::unordered_multiset<int> example = {1, 2, 3, 4};
 
    auto search = example.find(2
    if(search != example.end()) {
        std::cout << "Found " << (*search) << '\n';
    }
    else {
        std::cout << "Not found\n";
    }
}

二次

产出：

二次

Found 2

二次

另见

countreturns the number of elements matching specific key (public member function)
equal_rangereturns range of elements matching a specific key (public member function)

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