m)// std::cout << n.first << " = " << n.second << "; ";/// C++98 alternative:// for (std::map<std::string, int>::const_iterator it = m.begin(); it != m.end(); ++it)// std::cout << it->first << " = " << it->second << "; ";std::cout<<'\n';}int...
std::map iterator find(constKey&key); (1)(constexpr since C++26) const_iterator find(constKey&key)const; (2)(constexpr since C++26) template<classK> iterator find(constK&x); (3)(since C++14) (constexpr since C++26) template<classK> ...
std::map iterator erase(iterator pos); (1)(C++26 起为 constexpr) iterator erase(const_iterator pos); (2)(C++11 起) (C++26 起为 constexpr) iterator erase(const_iterator first, const_iterator last); (3)(C++26 起为 constexpr)
std::unordered_map iterator find(constKey&key); (1)(since C++11) const_iterator find(constKey&key)const; (2)(since C++11) template<classK> iterator find(constK&x); (3)(since C++20) template<classK> const_iterator find(constK&x)const; ...
map−multimap−set−multiset 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 ...
class Log { public: static void Write(char const *logline); static bool SaveTo(char const *filename); private: static std::list<std::string> m_data; }; In log.cpp we need to add std::list<std::string> Log::m_data; 饿汉模式: 饿汉模式 是指单例实例在程序运行时被立即执行初始化:...
iterator latch limits linalg list locale map mdspan memory memory_resource mutex new node_handle numbers numeric optional ostream print queue random ranges ratio regex scoped_allocator semaphore set shared_mutex source_location span sstream stack stacktrace stdfloat stop_token streambuf string strin...
<map> std::map and std::multimap associative containers <unordered_set> (since C++11) std::unordered_set and std::unordered_multiset unordered associative containers <unordered_map> (since C++11) std::unordered_map and std::unordered_multimap unordered associative containers ...
std::multimap<int,std::string>a={{3,"BMW"},{1,"Cruze"},{2,"City"},{1,"Sail"}};autob=a.equal_range(2);for(autox=std::make_reverse_iterator(b.second);x!=a.rend();++x){std::cout<<x->first<<" --> "<<x->second<<std::endl;}return0;} ...
In below example for std::get.Open Compiler #include <iostream> #include <tuple> int main () { std::tuple<int,char> mytuple (10,'x'); std::get<0>(mytuple) = 20; std::cout << "tuple contains: "; std::cout << std::get<0>(mytuple) << " and " << std::get<1>(my...