多重继承:什么是好例子? [英] Multiple Inheritance: What's a good example?

问题描述

我正在尝试找到一个使用多重继承的好例子，这是普通接口无法做到的.

I'm trying to find a good example for the use of multiple inheritance what cannot be done with normal interfaces.

我认为很难找到无法以其他方式建模的示例.

I think it's pretty hard to find such an example which cannot be modeled in another way.

我的意思是，有人可以给我命名一个很好的真实示例，说明您何时需要使用多重继承来尽可能清晰地实现此示例.而且，它不应该使用多个接口，而应该使用可以在C ++中继承多个类的方式.

I mean, can someone name me a good real-world example of when you NEED to use multiple inheritance to implement this example as clean as possible. And it should not make use of multiple interfaces, just the way you can inherit multiple classes in C++.

推荐答案

以下是经典的方法:

class Animal {
 public:
  virtual void eat();
};

class Mammal : public Animal {
 public:
  virtual void breathe();
};

class WingedAnimal : public Animal {
 public:
  virtual void flap();
};

// A bat is a winged mammal
class Bat : public Mammal, public WingedAnimal {
};

来源: Wiki .

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