getName().c_str() << std::endl; //equal_range std::pair<std::map<std::string, employee>::iterator, std::map<std::string, employee>::iterator> itrange; itrange = mapEmployee.equal_range(KEY_EMPLOYEE_K002); std::
问在基于范围的循环中访问std::map迭代器，如for_eachEN基于范围的循环和std::foreach都被设计为独立于...
returns an iterator to the first elementnot lessthan the given key (public member function) upper_bound returns an iterator to the first elementgreaterthan the given key (public member function) Observers key_comp returns the function that compares keys ...
first1['c'] =30; first1['d'] =40;map<char,int>first2( first1.begin(),first1.end() );map<char,int>first3( first2 ); map<char,int, classcomp> first4;///< class as Compare/** function pointer as Compare */bool(*fn_pt)(char,char) = fncomp;map<char,int,bool(*)(char,...
成员访问(Element access) 成员访问示例: 成员访问示例 添加、删除等修改相关操作(Modifiers) 示例代码: 示例代码 Observers 示例代码: 示例代码 其他操作(Operations) 示例代码: 示例代码 分配器(Allocator) 翻译、参考: http://www.cplusplus.com/reference/map/map/...
std::cout << const_iter->first << " " << const_iter->second << std::endl; const_iter++; } } int main() { std::cout << "original map:" << std::endl; std::map<int, std::string> myMap; for (int i = 0; i < 5; ++i) ...
问接受对抽象类的常量引用的C++构造函数无法初始化std::mapEN我的问题是带有签名B(const A &base)的B...
value - element value to insert first, last - range of elements to insert ilist - initializer list to insert the values from nh - a compatible node handle Type requirements - InputIt must meet the requirements of LegacyInputIterator. Return value 1-3) A pair consisting of an itera...
std::map<Key,T,Compare,Allocator>::lower_bound From cppreference.com <cpp |container |map 1,2)Returns an iterator pointing to the first element that isnot lessthan (i.e. greater or equal to)key. 3,4)Returns an iterator pointing to the first element that comparesnot less(i.e...
m1 [ 0 ].first (); m1 [ 0 ].second(); This is not illegal syntax as far as map is concerned but as far as size_t is concerned. As m1[0] will look up the element that has 0 (0.0 as it happens) as the key, and will create it if it does not exist. It will then create...