c++ 设计模式之 抽象工厂模式

概念：

抽象工厂模式提供了一个创建相似或相关相互依赖的对象，而不需要说明其具体的实现.

示例代码：

[cpp] 
#include <iostream> 
 
class Button 
{ 
public: 
    virtual void paint() = 0; 
}; 
 
class WinButton : public Button  
{ 
public: 
    void paint (){ 
        std::cout << " Window Button \n"; 
    } 
}; 
 
class MacButton : public Button  
{ 
public: 
    void paint (){ 
        std::cout << " Mac Button \n"; 
    } 
}; 
 
class ScrollBar  
{ 
public: 
    virtual void paint() = 0; 
}; 
 
class WinScrollBar : public ScrollBar  
{ 
public: 
    void paint (){ 
        std::cout << " Window ScrollBar \n"; 
    } 
}; 
 
class MacScrollBar : public ScrollBar { 
public: 
 
    void paint (){ 
        std::cout << " Mac ScrollBar \n"; 
    } 
}; 
 
 
class GUIFactory  
{ 
public: 
    virtual Button* createButton () = 0; 
    virtual ScrollBar* createScrollBar () = 0; 
}; 
 
class WinFactory : public GUIFactory  
{ 
public: 
    Button* createButton (){ 
        return new WinButton; 
    } 
    ScrollBar* createScrollBar (){ 
        return new WinScrollBar; 
    } 
}; 
 
class MacFactory : public GUIFactory  
{ 
public: 
    Button* createButton (){ 
        return new MacButton; 
    } 
    ScrollBar* createScrollBar (){ 
        return new MacScrollBar; 
    } 
}; 
 
int main() 
{ 
    GUIFactory* guiFactory; 
    Button *btn; 
    ScrollBar *sb; 
 
    guiFactory = new MacFactory; 
    btn = guiFactory->createButton(); 
    btn -> paint(); 
    sb = guiFactory->createScrollBar(); 
    sb -> paint(); 
 
    guiFactory = new WinFactory; 
    btn = guiFactory->createButton(); 
    btn -> paint(); 
    sb = guiFactory->createScrollBar(); 
    sb -> paint(); 
 
    return 0; 
} 

补充：软件开发 , C++ ,

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