>usingmap=std::map<Key, T, Compare, std::pmr::polymorphic_allocator<std::pair<constKey, T>>>; } (2)(since C++17) std::mapis a sorted associative container that contains key-value pairs with unique keys. Keys are
<map> std::map与std::multimap关联容器 <mdspan> (C++23) std::mdspan视图 <queue> std::queue与std::priority_queue容器适配器 <set> std::set与std::multiset关联容器 <span> (C++20) std::span视图 <stack> std::stack容器适配器 <unordered_map> ...
unordered_map(C++11) unordered_multimap(C++11) unordered_set(C++11) unordered_multiset(C++11) Container adaptors span(C++20)−mdspan(C++23) Iterators library Ranges library(C++20) Range factories−Range adaptors generator(C++23) Algorithms library ...
unordered_map(C++11) unordered_multimap(C++11) unordered_set(C++11) unordered_multiset(C++11) Container adaptors span(C++20)−mdspan(C++23) Iterators library Ranges library(C++20) Range factories−Range adaptors generator(C++23) Algorithms library ...
cppreference 详细介绍了 C++ 中的各种容器,如 vector、set、map、deque、priority_queue、unordered_map、array 等。每个容器的文档都包括其使用方法、性能特点以及使用时需要注意的事项。 IO 操作 cppreference 提供了 C++ 风格的 IO 操作(如 stringstream 类和输入/输出操纵符)以及 C 风格...
#include <typeindex>// 特化 std::hash 使得 MyType 可以成为// std::unordered_set 和 std::unordered_map 中的键。// 直接展开命名空间 std 可能会引发未定义行为,而且特化类模板也不需要这样做。template<>structstd::hash<MyType>{std::size_toperator()(constMyType&t)const{returnt.hash();}};...
std::unordered_map<Key, T, Hash, KeyEqual, std::pmr::polymorphic_allocator<std::pair<constKey, T>>>; } (2)(since C++17) std::unordered_mapis an associative container that contains key-value pairs with unique keys. Search, insertion, and removal of elements have average constant-time ...
C reference C89, C95, C99, C11, C17, C23 │ Compiler support C99, C23 Language Basic concepts Keywords Preprocessor Expressions Declaration Initialization Functions Statements Headers Type support Program utilities Variadic functions Diagnostics library Dynamic memory management Strings library ...
C reference C89, C95, C99, C11, C17, C23 │ Compiler support C99, C23 Language Basic concepts Keywords Preprocessor Expressions Declaration Initialization Functions Statements Headers Type support Program utilities Variadic functions Diagnostics library Dynamic memory management Strings library ...
C reference C89, C95, C99, C11, C17, C23 │ Compiler support C99, C23 Language Basic concepts Keywords Preprocessor Expressions Declaration Initialization Functions Statements Headers Type support Program utilities Variadic functions Diagnostics library Dynamic memory management Strings library ...