Why am I getting string does not name a type Error

Question

game cpp   include  lt iostream gt   include  lt string gt   include  lt sstream gt   include  game h   include  board h   include  piece h   using namespace std    game h   ifndef GAME H  define GAME H  include  lt string gt   class Game       private          string white          string black          string title      public          Game istream amp   ostream amp            void display colour  short        endif     The error is      game h 8 error   string  does not name a type   game h 9 error   string  does not name a type

User · Accepted Answer

Your using declaration is in game cpp  not game h where you actually declare string variables  You intended to put using namespace std  into the header  above the lines that use string  which would let those lines find the string type defined in the std namespace   As others have pointed out  this is not good practice in headers -- everyone who includes that header will also involuntarily hit the using line and import std into their namespace  the right solution is to change those lines to use std  string instead

User · Answer

string does not name a type  The class in the string header is called std  string   Please do not put using namespace std in a header file  it pollutes the global namespace for all users of that header  See also  Why is  using namespace std   considered a bad practice in C      Your class should look like this    include  lt string gt   class Game       private          std  string white          std  string black          std  string title      public          Game std  istream amp   std  ostream amp            void display colour  short

User · Answer

Just use the std   qualifier in front of string in your header files   In fact  you should use it for istream and ostream also - and then you will need  include  lt iostream gt  at the top of your header file to make it more self contained

User · Answer

Try a using namespace std  at the top of game h or use the fully-qualified std  string instead of string   The namespace in game cpp is after the header is included

User · Answer

You can overcome this error in two simple ways First way using namespace std  include  lt string gt     then you can use string class the normal way  Second way    after including the class string in your cpp file as follows include  lt string gt    Now when you are using a string class you have to put   std     before you write  string as follows   std  string name     a string declaration

[c++] Why am I getting string does not name a type Error?

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