我该如何遍历std :: map中的元素 <std::string,shared_ptr<A> &gt;在C ++中

Question

how to compare data of 2 maps like

std::map<std::string,shared_ptr<A>> where A is struct type. I need to compare after the serialization of data type.

eg.

  struct A
 {
     int age;
    std::string name;
 }

thanks

Answer 1

To iterate through a map, use an iterator :

typedef std::map<std::string, shared_ptr<A> >  Container_Type;
Container_Type my_map;
Container_Type::iterator iter;
for (iter = my_map.begin(); iter != my_map.end(); ++iter)
(
  // Do stuff here
}

The fields of the map can be accessed by:

  std::string key;
  key = iter->first;
  shared_ptr<A> value = iter->second;