c ++文字数组表示法

Question

你好，我想做一个一行声明，我正在为我的Quiz项目使用QT创建器，我想通过文字数组表示法（JS）传递它，还有其他方法可以在一行声明中声明它。

我想这样构造它：

Card c = new Card("Question?", 2, (Answer[]){ 1, "answer 1", 2, "answer 2", 3, "answer 3"} );

这是我的课程：

class Answer{
private:
    qint8 id;
    QString answer;

public:
    Answer(QString nAnswer, qint8 nId);
    QString getAnswer();
    qint8 getId();

};

class Card
{
private:
    QString question;
    QVector<Answer> answers;
    qint8 solutionId;

public:
    Card(QString nQuestion, qint8 nSolutionId, Answer[] );
    QString getQuestion();
    QVector<Answer> getAnswers();
    // void setSolutionId(qint8 nSolutionId);

};

Answer::Answer(QString nAnswer, qint8 nId)
{
    answer = nAnswer;
    id = nId;
}


Card::Card(QString nQuestion, qint8 nSolutionId, Answer nAnswers[])
{
    question = nQuestion;
    solutionId = nSolutionId;
}

Answer 1

为了使用

Card c = Card("Question?", 2, { {"answer 1", 1}, {"answer 2", 2}, {"answer 3", 3} } );

您需要更改您的

Card(QString nQuestion, qint8 nSolutionId, Answer[] );

构造函数采用QVector<Answer>代替Answer[]。看起来像

Card(QString nQuestion, qint8 nSolutionId, QVector<Answer> nAnswers );

//...

Card(QString nQuestion, qint8 nSolutionId, QVector<Answer> nAnswers ) :
    question(nQuestion),
    answers(nAnswers),
    solutionId(nSolutionId)     
{}

之所以可行，是因为QVector<T>的构造函数需要一个std::initializer_list<T>，所以>

{ {"answer 1", 1}, {"answer 2", 2}, {"answer 3", 3} }
将被转换为用于初始化std::initializer_list<Answer>的answers。