C++ C++；抽象类问题

我有一个抽象类，定义如下：

class AnimatedDraw
{
public:
    virtual void Draw(sf::RenderWindow &window) = 0;
    virtual void Draw(sf::RenderWindow &window, sf::Shader shader) = 0;
    virtual void Update(sf::Clock &time) = 0;
};

class ScreenLayer explicit : public AnimatedDraw
{
public:
    ScreenLayer(void);
    virtual void Draw(sf::RenderWindow &window) override; //I'll need to be able to override these again in subclasses
    virtual void Draw(sf::RenderWindow &window, sf::Shader &shader) override;
    virtual void Update(sf::Clock &clock) override;
    ~ScreenLayer(void);
};

#include "ScreenLayer.h"
ScreenLayer::ScreenLayer(void)
{
}
void ScreenLayer::Draw(sf::RenderWindow &window)
{
}
void ScreenLayer::Draw(sf::RenderWindow &window, sf::Shader &shader)
{
}
void ScreenLayer::Update(sf::Clock &clock)
{
}
ScreenLayer::~ScreenLayer(void)
{
}

我试图从它继承到另一个类中，定义如下：

class AnimatedDraw
{
public:
    virtual void Draw(sf::RenderWindow &window) = 0;
    virtual void Draw(sf::RenderWindow &window, sf::Shader shader) = 0;
    virtual void Update(sf::Clock &time) = 0;
};

class ScreenLayer explicit : public AnimatedDraw
{
public:
    ScreenLayer(void);
    virtual void Draw(sf::RenderWindow &window) override; //I'll need to be able to override these again in subclasses
    virtual void Draw(sf::RenderWindow &window, sf::Shader &shader) override;
    virtual void Update(sf::Clock &clock) override;
    ~ScreenLayer(void);
};

#include "ScreenLayer.h"
ScreenLayer::ScreenLayer(void)
{
}
void ScreenLayer::Draw(sf::RenderWindow &window)
{
}
void ScreenLayer::Draw(sf::RenderWindow &window, sf::Shader &shader)
{
}
void ScreenLayer::Update(sf::Clock &clock)
{
}
ScreenLayer::~ScreenLayer(void)
{
}

源文件现在是空函数，如下所示：

class AnimatedDraw
{
public:
    virtual void Draw(sf::RenderWindow &window) = 0;
    virtual void Draw(sf::RenderWindow &window, sf::Shader shader) = 0;
    virtual void Update(sf::Clock &time) = 0;
};

class ScreenLayer explicit : public AnimatedDraw
{
public:
    ScreenLayer(void);
    virtual void Draw(sf::RenderWindow &window) override; //I'll need to be able to override these again in subclasses
    virtual void Draw(sf::RenderWindow &window, sf::Shader &shader) override;
    virtual void Update(sf::Clock &clock) override;
    ~ScreenLayer(void);
};

#include "ScreenLayer.h"
ScreenLayer::ScreenLayer(void)
{
}
void ScreenLayer::Draw(sf::RenderWindow &window)
{
}
void ScreenLayer::Draw(sf::RenderWindow &window, sf::Shader &shader)
{
}
void ScreenLayer::Update(sf::Clock &clock)
{
}
ScreenLayer::~ScreenLayer(void)
{
}

我做错了，因为我的编译器（VC2010）产生了几个错误，包括抱怨它在

ScreenLayer.cpp

文件中找不到

ScreenLayer

，还有几行关于这行的

类ScreenLayer explicit:public AnimatedDraw

我以前没有尝试过使用显式重写，但根据，你就是这样做的。VC2010不支持显式覆盖，还是我搞糟了其他事情

---

提前感谢

显然它不支持显式。这很好，因为它是。

我的印象是，C++0x不接受这种使用显式和重写的方式，而支持使用属性。你确定这在新标准下是合法的吗？