子类也将从其父类的超类继承吗？

Question

Let's say I have a class named Food , a subclass of it named Chicken , then a subclass of the latter which is named Fillet . Will the Fillet class also inherit from the Food class? Also, is it right to call Fillet as another subclass of the Food class?

Answer 1

Simple answer: Yes, to both questions. Every subclass inherits all behavior and methods from all its parents (if they're visible).

Answer 2

it depends on access specifiers private , public , protected . All public members of Food will be inherited by Fillet .

I think source code will help you a lot.

class base 
{
    public:
        int x;
    protected:
        int y;
    private:
        int z;
};

class publicDerived: public base
{
    // x is public
    // y is protected
    // z is not accessible from publicDerived
};

class protectedDerived: protected base
{
    // x is protected
    // y is protected
    // z is not accessible from protectedDerived
};

class privateDerived: private base
{
    // x is private
    // y is private
    // z is not accessible from privateDerived
}

Answer 3

From the documentation ;

Excepting Object, which has no superclass, every class has one and only one direct superclass (single inheritance). In the absence of any other explicit superclass, every class is implicitly a subclass of Object. Classes can be derived from classes that are derived from classes that are derived from classes, and so on, and ultimately derived from the topmost class, Object. Such a class is said to be descended from all the classes in the inheritance chain stretching back to Object.

So Fillet is a descendant of Food and subclass of Chicken .

It will inherit explicitly from the super class of its parent depending on access modifiers used in top most class.