Run this code #include <iostream>#include <unordered_set>intmain(){std::unordered_set<int>example{1,2,3,4};for(intx:{2,5})if(example.contains(x))std::cout<<x<<": Found\n";elsestd::cout<<x<<": Not found\n";} Output: ...
insert(myString); cout << "My set contains:" << endl; for (const string& x : mySet) { cout << x << " "; } cout << endl; return 0; } 输出: My set contains: tenth first third 示例2:: // C++ program to illustrate // unordered_set::insert() #include <array> #...
template<class K> bool contains(const K& key) const participe uniquement à la résolution de surcharge si key_compare elle est transparente.ExempleC++ Copie // Requires /std:c++20 or /std:c++latest #include <unordered_set> #include <iostream> int main() { std::unordered_multiset<int> ...
containsC++20 Compruebe si hay un elemento con la clave especificada en unordered_set. count Busca el número de elementos que coinciden con una clave especificada. emplace Agrega un elemento construido en contexto. emplace_hint Agrega un elemento construido en contexto, con sugerencia. empty Co...
stdunordered_setuSetcoutituSetcoutitcoutendluSetuSetuSetcoutituSetcoutitcoutendlreturn0;} Ouput Output of the above code is as follows − uSet contains: e d c b a after erased uSet contains: c b a Print Page Previous Next Advertisements...
if (mySet.count(5)) { std::cout << "mySet contains 5" << std::endl; } 第二部分:unordered_set迭代器和遍历(1000字) unordered_set提供了迭代器来遍历集合中的元素。迭代器是指向unordered_set中元素的指针,可以使用它们来访问和操作个别元素。 要访问unordered_set中的第一个元素,可以使用begin()函...
unordered_set::emplace_hint Lookup unordered_set::count unordered_set::find unordered_set::contains (C++20) unordered_set::equal_range Bucket interface unordered_set::begin(size_type)unordered_set::cbegin(size_type) unordered_set::end(size_type)unordered_set::cend(size_type) unordered_set::buc...
Mysetcontains: tenth first third 程序2: CPP // C++ program to illustrate // unordered_set::insert() #include<array> #include<iostream> #include<string> #include<unordered_set> usingnamespacestd; intmain() { unordered_set<std::string>mySet={"first", ...
= c1.end(); ++it) { Myset::const_reference ref = *it; std::cout << "[" << ref << "] "; } std::cout << std::endl; return (0); } Output Copy [c] [b] [a] unordered_multiset::containsChecks if there's an element with the specified key in the unordered_multiset....
将元素存储在unordered_set中,并将它们存储在unordered_map中 假设我有以下User结构: structUser{stringuserId; UserType userType;// UserType is just an enumerationstringhostName;stringipAddress;//and more other attributes will be added here};