C++一道关于继承虚函数的题目,求大神解答,感激不尽Human with Skin Color

Question

Time Limit: 1sec Memory Limit:256MB
Description

The class Human is defined as follows:

class Human {
public:
virtual string getSkinColor() = 0;
};

You are to derive two classes European and African from Human, with the skin colors "white" and "black" respectively.

Your submitted source code should include the whole implementation of the classes European and African, but without the class Human.
No main() function should be included.

Answer 1

class European : public Human
{
public:
virtual string getSkinColor() { return "white"; }
};
class African : public Human
{
public:
virtual string getSkinColor() { return "black"; }
};