std::map<char,int>::iterator it = mymap.begin(); mymap.insert (it, std::pair<char,int>('b',300)); // max efficiency inserting mymap.insert (it, std::pair<char,int>('c',400)); // no max efficiency inserting // 由一
若map 为空,则返回的迭代器将等于 end()。参数 (无) 返回值 指向首元素的迭代器。 复杂度 常数。 示例运行此代码 #include <iostream> #include <map> int main() { std::map<int, float> num_map; num_map[4] = 4.13; num_map[9] = 9.24; num_map[1] = 1.09; // 调用 a_map.begin()...
std::map::cbegin std::map::cend std::map::clear std::map::count std::map::crbegin std::map::crend std::map::emplace std::map::emplace_hint std::map::empty std::map::end std::map::equal_range std::map::erase std::map::extract std::map::find std::map::get_allocator std...
std::map::cbegin std::map::cend std::map::clear std::map::count std::map::crbegin std::map::crend std::map::emplace std::map::emplace_hint std::map::empty std::map::end std::map::equal_range std::map::erase std::map::extract std::map::find std::map::get_allocator std...
// map::begin/end#include <iostream>#include <map>intmain () { std::map<char,int> mymap; mymap['b'] = 100; mymap['a'] = 200; mymap['c'] = 300;// show content:for(std::map<char,int>::iterator it=mymap.begin(); it!=mymap.end(); ++it) std::cout << it->first...
析构map (公开成员函数) operator= 将值赋给容器 (公开成员函数) get_allocator 返回关联的分配器 (公开成员函数) 元素访问 at 带越界检查访问指定的元素 (公开成员函数) operator[] 访问或插入指定的元素 (公开成员函数) 迭代器 begincbegin (C++11) 返回指向起始的迭代器 (公开成...
cbegin: Return const_iterator to beginning (public member function ) cend: Return const_iterator to end (public member function ) crbegin: Return const_reverse_iterator to reverse beginning (public member function ) crend: Return const_reverse_iterator to reverse end (public member function ) ...
// map::cbegin/cend#include <iostream>#include <map>intmain () { std::map<char,int> mymap; mymap['b'] = 100; mymap['a'] = 200; mymap['c'] = 300;// print content:std::cout <<"mymap contains:";for(autoit = mymap.cbegin(); it != mymap.cend(); ++it) std::cout ...
begincbegin (C++11) returns an iterator to the beginning (public member function) endcend (C++11) returns an iterator to the end (public member function) rbegincrbegin (C++11) returns a reverse iterator to the beginning (public member function) ...
析构map (公开成员函数) operator= 赋值给容器 (公开成员函数) get_allocator 返回相关的分配器 (公开成员函数) 元素访问 at (C++11) 访问指定的元素,同时进行越界检查 (公开成员函数) operator[] 访问或插入指定的元素 (公开成员函数) 迭代器 begincbegin ...