如果[first, last) 的元素 elem 没有按表达式 bool(elem < value) 划分,那么行为未定义。 (C++20 前) 等价于 std::lower_bound(first, last, value, std::less{})。 (C++20 起)2) 通过comp 确定顺序:返回[first, last) 中首个使得 bool(comp(*iter, value)) 是false 的迭代器 iter,或者在不...
lower_bound (1) template<classForwardIt,classT=typenamestd::iterator_traits<ForwardIt>::value_type>ForwardIt lower_bound(ForwardIt first, ForwardIt last,constT&value){returnstd::lower_bound(first, last, value,std::less{});} lower_bound (2) ...
(public member function) upper_bound returns an iterator to the first element greater than the given key (public member function) Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/container/multimap/lower_bound&oldid=161957" Category...
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const_iterator lower_bound( const K& x ) const; (4) (C++14 起) 1,2) 返回指向首个不小于(即大于或等于)key 的元素的迭代器。3,4) 返回指向首个比较不小于(即大于或等于)值 x 的元素的迭代器。此重载只有在限定标识 Compare::is_transparent 合法并指代类型时才会参与重载决议。它允许调用此函数时...
插入start到end的元素到map中。只有在val不存在时插入val。返回值是一个指向被插入元素的迭代器和一个描述是否插入的bool值。keycomp语法keycomparekeycompkeycomp函数返回一个比较key的函数。lowerbound语法iteratorlowerboundconstKEYTYPEk haha每一天 分享于2015-01-03 10:42...
lower_bound returns an iterator to the first elementnot lessthan the given key (public member function) upper_bound returns an iterator to the first elementgreaterthan the given key (public member function) Observers key_comp returns the function that compares keys ...
std::set<Key,Compare,Allocator>::lower_bound From cppreference.com <cpp |container |set 1,2)Returns an iterator pointing to the first element that isnot lessthan (i.e. greater or equal to)key. 3,4)Returns an iterator pointing to the first element that comparesnot less(i.e. ...
ranges::lower_bound (C++20) 返回首个不小于 给定值的元素的迭代器 (算法函数对象) [编辑] ranges::upper_bound (C++20) 返回首个大于 给定值的元素的迭代器 (算法函数对象) [编辑] ranges::binary_search (C++20) 判断元素是否在偏序范围中 (算法函数对象) [编辑] ranges::equal_...
ranges::lower_bound (C++20) 返回首个不小于 给定值的元素的迭代器 (算法函数对象) ranges::upper_bound (C++20) 返回首个大于 给定值的元素的迭代器 (算法函数对象) ranges::binary_search (C++20) 判断元素是否在偏序范围中 (算法函数对象) ...