std::unordered_map std::pair<iterator,bool>insert(constvalue_type&value); (1)(C++11 起) std::pair<iterator,bool>insert(value_type&&value); (2)(C++17 起) template<classP> std::pair<iterator,bool>insert(P&&value); (3)(C++11 起) ...
#include <iostream>#include <string>#include <unordered_map>intmain(){std::unordered_map<int,std::string>dict={{1,"one"},{2,"two"}};dict.insert({3,"three"});dict.insert(std::make_pair(4,"four"));dict.insert({{4,"another four"},{5,"five"}});constboolok=dict.insert({1,...
std::unordered_map is an associative container that contains key-value pairs with unique keys. Search, insertion, and removal of elements have average constant-time complexity. Internally, the elements are not sorted in any particular order, but organized into buckets. Which bucket an element is...
#include <iostream>#include <unordered_map>intmain(){std::unordered_map<int,char>example{{1,'a'},{2,'b'}};for(intx:{2,5})if(example.contains(x))std::cout<<x<<": 找到\n";elsestd::cout<<x<<": 未找到\n";} 输出:
>unordered_map 可以学习哈希表相关知识 >array 可以当作部分 pair 和 tuple 的替用品,或者替代原生数组 # 一些其他容器 >bitset >basic_string 另外,可以参阅C 的字符串函数 # IO >cpp 风格 IO 可以了解 stringstream 类,以及 输入/输出操纵符 >C 风格 IO ...
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 ...
map−unordered_map(C++11) priority_queue−span(C++20) その他のコンテナ: シーケンス−連想 非順序連想−アダプタ イテレータライブラリ 範囲ライブラリ(C++20) アルゴリズムライブラリ 数値演算ライブラリ 一般的な数学関数
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) stack−queue−priority_queue span(C++20) Biblioteca de iteradores Biblioteca de ranges(C++20) Biblioteca de algoritmos Constrained algorithms(C++20) ...
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 ...