C ++通过枚举作为参数 [英] C++ pass enum as parameter

问题描述

如果我有一个类似这样一个简单的类卡：

If I have a simple class like this one for a card:

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一个卡的实例如何传递枚举？

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;
}

错误：'Suit'未在此范围内声明

error: 'Suit' was not declared in this scope

我知道这是有效的：

#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一个类型为Suit的变量？ p>

but how do I create a variable of type Suit in another file?

推荐答案

使用 Card :: Suit 范围。实际上，你应该参考这样的西装;我有点惊讶， Card.CLUBS 编译，我一直认为你必须做 Card :: CLUBS 。

Use Card::Suit to 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 that Card.CLUBS compiles and I always thought you had to do Card::CLUBS.

这篇关于C ++通过枚举作为参数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！