declare function's type as struct c++ -

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so have class named user. inside have made struct called flights , want make function in class return struct values of flights. possible? follow. know doesn't work there way?

   class user    {        string name, surname...;        struct flights        {           int miles;           double cost;         }      struct add_miles(reads class);    }     struct user::add_miles()     {         return flights;      }

i not sure understand requirement see try:

 #include<iostream>  class user    {        //string name, surname...;        public:        struct flights        {           int miles;           double cost;         }myflights;      struct flights  add_miles()      {         return myflights;       } };      int main()    {        user me;        me.myflights.miles=100;        std::cout<<me.add_miles().miles;     }

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