Error vector does not name a type

Question

I m having lots of errors in my final project  a poker and black jack sim   I m using a vector to implement the  hands  in the blackJack class  and I m using a structured data type declared in another class  which is publicly inherited  The error I m worried about is the compiler I m using telling me that I m not declaring a type in the vector   blackJack header file     ifndef BLACKJACK H   define BLACKJACK H   include  lt vector gt    include  card h    class blackJack  public cards     private      vector  lt Acard gt  playerHand      vector  lt Acard gt  dealerHand    public      blackJack        void dealHands        void hitOrStay        void dealerHit        int handleReward int       void printHands          endif    card header file  this is the class black jack inherits from      ifndef CARD H   define CARD H   const char club       xe2 x99 xa3    const char heart       xe2 x99 xa5    const char spade       xe2 x99 xa0    const char diamond       xe2 x99 xa6      structured data to hold card information    including      a number  representing Ace-King  aces low     a character  representing the card s suit  struct Acard       int number     char pic 4              a class to hold information regarding a deck of cards    including     An array of 52 Acard datatypes  representing our Deck    an index to the next card in the array    a constructor initializing the array indices to Ace-king in each suit    a function using random numbers to shuffle our deck of cards    13 void functions to print each card  class cards      private      Acard Deck 52       int NextCard    public      cards        Acard getCard        void shuffleDeck        void cardAce char         void cardTwo char         void cardThree char         void cardFour char         void cardFive char         void cardSix char         void cardSeven char         void cardEight char         void cardNine char         void cardTen char         void cardJack char         void cardQueen char         void cardKing char             endif

User · Answer

You need to either qualify vector with its namespace  which is std   or import the namespace at the top of your CPP file   using namespace std

User · Answer

use       std  vector  lt Acard gt  playerHand    everywhere qualify it by std    or do       using std  vector    in your cpp file       You have to do this because vector is defined in the std namespace and you do not tell your program to find it in std namespace  you need to tell that

User · Answer

You forgot to add std   namespace prefix to vector class name

User · Answer

Also you can add  include lt vector gt  in the header  When two of the above solutions don t work

[c++] Error: vector does not name a type

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