错误:vector没有命名类型

Question

我的最终项目(扑克和黑色插孔​​卡片)中有很多错误.我正在使用向量来实现blackJack类中的"hands",我正在使用在另一个类中声明的结构化数据类型,这是公开继承的.我担心的错误是我正在使用的编译器告诉我,我没有在向量中声明一个类型.

blackJack头文件:

 #ifndef BLACKJACK_H
 #define BLACKJACK_H
 #include <vector>
 #include "card.h"

 class blackJack: public cards
 {
 private:
    vector <Acard> playerHand;
    vector <Acard> dealerHand;

 public:
    blackJack();
    void dealHands();
    void hitOrStay();
    void dealerHit();
    int handleReward(int);
    void printHands();
 };
 #endif 

卡头文件(这是黑杰克继承的类):

 #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

Answer 1

您忘记将std::命名空间前缀添加到vector类名.

Answer 2

使用:

std::vector <Acard> playerHand;

到处都是合格的 std::

或做:

using std::vector;

在你的cpp文件中.

你必须这样做,因为vector在std命名空间中定义,你不告诉你的程序在std命名空间中找到它,你需要告诉它.

Answer 3

您需要vector使用其命名空间(即std)进行限定,或者在CPP文件的顶部导入命名空间:

using namespace std;

Answer 4

您也可以添加#include<vector>标题.当上述两种解决方案不起作用时.