> using set = std::set<Key, Compare, std::pmr::polymorphic_allocator<Key>>; } (2) (C++17 起) std::set 是一种关联容器,含有 Key 类型对象的已排序集。用比较函数 比较 (Compare) 进行排序。搜索、移除和插入拥有对数复杂度。set 通常以红黑树实现。 标准库使用比较 (Compare) 的规定时,均用...
std::set满足容器(Container)、知分配器容器(AllocatorAwareContainer)、关联容器(AssociativeContainer)和可逆容器(ReversibleContainer)的要求。 std::set的全部成员函数均为constexpr:在常量表达式求值中创建并使用std::set对象是可能的。 然而,std::set对象通常不能为constexpr,因为任何动态分配的存储都必须在相同的常量...
#include <iostream> #include <set> void println(auto rem, auto const& container) { std::cout << rem << '{'; for (char sep[]{0, ' ', 0}; const auto& item : container) std::cout << sep << item, *sep = ','; std::cout << "}\n"; } int main() { std::set data{...
set(std::from_range_t, R&&rg, constCompare&comp=Compare(), constAllocator&alloc=Allocator()); (12)(since C++23) template<container-compatible-range<value_type>R> set(std::from_range_t, R&&rg, constAllocator&alloc) :set(std::from_range,std::forward<R>(rg), Compare(), alloc){} ...
std::set:: std::set::contains boolcontains(constKey&key)const; (1)(since C++20) template<classK>boolcontains(constK&x)const; (2)(since C++20) 1)Checks if there is an element with key equivalent tokeyin the container. 2)Checks if there is an element with key that comparesequivalent...
External Links−Non-ANSI/ISO Libraries−Index−std Symbol Index C reference C89,C95,C99,C11,C17,C23│Compiler supportC99,C23 Language Basic concepts Keywords Preprocessor Expressions Declaration Initialization Functions Statements Headers Type support ...
stdman has been tested on Linux and OS X. Installation There's no need to compile stdman if you just want to install the man pages. Instead, just run: ./configure make install # as a user with appropriate permissions to install If you need to pass options to configure, you can do ...
; std::hash<std::string> hash_fn; size_t str_hash = hash_fn(str); std::cout << str_hash << '\n'; } Output: 391070135 Veranschaulicht Schaffung einer Hash-Funktion für einen Benutzer definierten Typ. Mit diesem als Template-Parameter für std::unordered_map, std::unordered_set...
(of std::basic_ios função pública membro) [edit] setstate define bandeiras estaduais Original: sets state flags The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (of std::basic_ios função p...
setstate définit des indicateurs d'état Original: sets state flags The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique de std::basic_ios) [edit] clear efface les indicateurs...