c++ - Return class instance from class -

i have code, want fill vector of strings class

class {   public:     b foo(const string & name) const; }  class b {   public:     void add(const string & name);     vector<string> list; }  void b::add(const string & name) {    list.push_back(name); }  b a::foo(const string & name) const {   b tmp;   tmp.add(name);   return tmp; } 

i know doesnt work because tmp gets destructed, dont know how fix it, should return pointer tmp in foo()?

i know doesnt work because tmp gets destructed

it's destroyed after it's copied give function's return value, there's no problem there. there problem if returned pointer or reference local variable; you're not doing that.

i dont know how fix it

it's not broken, there's nothing fix.

should return pointer tmp

no, introduce problem you're thinking of. returning value avoids problem.