Question

我有一个基类（标题）：

class BaseClass
{
    public:
        BaseClass(int); // note no default constructor.
}

和派生它的类：

class DerivedClass : public BaseClass
{
    public:
        DerivedClass(void);
}

DerivedClass::DerivedClass (void) // note SPECIFICALLY no parameters.
{
    super (10); // equivalent of what I am trying to do in Java (I think)
}

如何在派生类中调用继承类的构造函数？

Answer 1

像这样：

DerivedClass::DerivedClass (void) : BaseClass(10) 
{ }

注意：如果您不熟悉语法，请留意成员初始化列表。

Answer 2

class BaseClass 
{ 
    public: 
        BaseClass(int) {};
} ;
class DerivedClass : public BaseClass 
{ 
    public: 
        DerivedClass(void); 
}; 

DerivedClass::DerivedClass (void)
:BaseClass(10)
{ 

}

Answer 3

这就是你想要的：

DerivedClass(void):BaseClass(10) {
    //blah blah blah
}

如何指定继承类的构造函数定义？

3 个答案: