接口如在java中的c ++？ [英] Interface as in java in c++?

问题描述

可能重复：

有人问我一个qustion：在C ++没有接口像java中，但事件然后你可以实现他们在c + +，你会怎么做？

Somebody asked me a qustion: "In C++ there are no interfaces like in java. But event then you could realize them in c++, how would you do that?"

如何？我将使用虚拟方法创建一个类。这将看起来像一个接口在java或？

How? I would make a class with virtual methods. That would be look like an interface as in java or?

谢谢

推荐答案

您可以使用多个继承在C ++中创建接口。

You can create interfaces in C++ using multiple inheritance.

您创建一个纯虚拟的基类（所有函数= 0），然后您的类继承

You create a base class which is pure virtual (all functions =0) and then your classes inherit from this.

多继承意味着你可以继承自己喜欢的这些。

Multiple inheritance means you can inherit from as many of these as you like.

// Interface definition
class ISomethingable
{
public:
    virtual ~ISomethingable() {}
    virtual void DoSomething() = 0;    
}

// Your code
class MyClass : public ISomethingable
{
public:
    void DoSomething()
    {
         // Do something concrete.
    }
}

另请参阅：如何在C ++中声明接口？

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