The next action is to process the header bodies into subitems. To do this, add the following highlighted declaration to the public section of the header_body class:
public: header_body() = default; header_body(const string& b) : body(b) {} string get_body() const { return body; } vector<pair<string, string>> subitems(); };
Each subitem will be a name/value pair, and since the order of a subitem may be important, the subitems are stored in a vector. Change the main function, remove the call to get_headers, and instead print out each header individually:
email eml; eml.parse(stm); for (auto header : eml) { cout << header.first << " : "; vector<pair<string, string>> subItems = header.second.subitems(); ...
