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) const_iterator find(constKey&key)const; (2) template<classK> iterator find(constK&x); (3)(since C++14) template<classK> const_iterator find(constK&x)const; (4)(since C++14) 1,2)Finds an element with key equivalent tokey. ...
[key, value] : m) std::cout << '[' << key << "] = " << value << "; "; // C++11 方案: // for (const auto& n : m) // std::cout << n.first << " = " << n.second << "; "; // // C++98 方案: // for (std::map<std::string, int>::const_iterator it...
std::map iterator erase(iterator pos); (1) iterator erase(const_iterator pos); (2)(C++11 起) (3) iterator erase(iterator first, iterator last); (C++11 前) iterator erase(const_iterator first, const_iterator last); (C++11 起)
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 ...
这六大组件的交互关系:container(容器) 通过 allocator(配置器) 取得数据储存空间,algorithm(算法)通过 iterator(迭代器)存取 container(容器) 内容,functor(仿函数) 可以协助 algorithm(算法) 完成不同的策略变化,adapter(配接器) 可以修饰或套接 functor(仿函数) 序列式容器: vector-数组,元素不够时再重新分配内存...
文件: class_template.cpp deque_learn.cpp exception.cpp fun_template.cpp fun_template2.cpp inhire_learn.cpp list_learn.cpp map_learn.cpp multimap_learn.cpp multiset_learn.cpp my_vector.cpp priority_queue_learn.cpp queue_learn.cpp set_learn.cpp stack_learn.cpp static_var_in_class.cpp std_...
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:...
<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 ...
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...