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c++ 未获承认的继承权
原标题:c++ inheritance not recognized

是否有某种解决办法,或者我必须保持准确的类别?

纽约总部

Class Car {
public:
    Car();
    virtual ~Car();
};

class Bmw:Car {
public:
    Bmw();
    virtual ~Bmw();
};

void Start(Car& mycar) {};

页: 1

Car::Car(){}
Car::~Car() {}

Bmw::Bmw()
    :Car::Car(){}
Bmw::~Bmw() {}

int main() {
    Car myCar;
    Bmw myBmw;

    Start(myCar); //works
    Start(myBmw); //!! doesnt work

    return 0;
}
最佳回答

C++ 私人继承的违约情况,因此,你需要宣布: 缩略语:

class Bmw:public Car

另外,为了完全准确起见,您实际上应当有<条码>Start,作为<条码>的虚拟方法,并按后代班的需要予以推翻。

问题回答

页: 1

你们想在此做的是公共继承,但不是私人继承(在<条码>C++>上课的违约)。

您有<代码>Bmw, 私人继承Car, 防止转换Bmw 参考。 将定义改为:

class Bmw : public Car

页: 1 载于bmw IS A car, 私人继承 (未明确指明的违约情况以及你在这里的情况)代表关系中加以执行。

Try:

class Bmw: public Car
{
    // ...
];

页: 1

<代码> 私人,以缺省为准(>/code>es(public<>/code> for structs)。





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