C++传递枚举作为参数
如果我有一个像这样的卡类的简单类：
class Card {
public:
enum Suit { CLUBS, DIAMONDS, HEARTS, SPADES };
Card(Suit suit);
};
然后我想在另一个文件中创建卡的实例，如何传递枚举？
#include "Card.h"
using namespace std;
int main () {
Suit suit = Card.CLUBS;
Card card(suit);
return 0;
}
错误：“Suit”未在此范围内声明
我知道这是可行的：
#include "Card.h"
using namespace std;
int main () {
Card card(Card.CLUBS);
return 0;
}
但是如何在另一个文件中创建 Suit 类型的变量？
If I have a simple class like this one for a card:
class Card {
public:
enum Suit { CLUBS, DIAMONDS, HEARTS, SPADES };
Card(Suit suit);
};
and I then want to create an instance of a card in another file how do I pass the enum?
#include "Card.h"
using namespace std;
int main () {
Suit suit = Card.CLUBS;
Card card(suit);
return 0;
}
error: 'Suit' was not declared in this scope
I know this works:
#include "Card.h"
using namespace std;
int main () {
Card card(Card.CLUBS);
return 0;
}
but how do I create a variable of type Suit in another file?
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当不在 Card 范围内时，使用 Card::Suit 来引用类型。 ...实际上，您也应该引用类似的套装；我对
Card.CLUBS编译感到有点惊讶，我一直认为您必须执行Card::CLUBS。Use
Card::Suitto reference the type when not inside of Card's scope. ...actually, you should be referencing the suits like that too; I'm a bit surprised thatCard.CLUBScompiles and I always thought you had to doCard::CLUBS.Suit 是 Card 类命名空间的一部分，因此请尝试：
Suit is part of the class Card's namespace, so try: