设计模式——抽象工厂模式（C++实现）

#include <iostream>
#include <string>

using namespace std;


class STAbstractProductA
{
public:
        virtual void use() = 0;
};

class STProductA1: public STAbstractProductA
{
public:
        virtual void use()
        {
                cout<< "use ProductA1............"<< endl;
        }
};

class STProductA2: public STAbstractProductA
{
public:
        virtual void use()
        {
                cout<< "use ProductA2............"<< endl;
        }
};

class STAbstractProductB
{
public:
        virtual void eat() = 0;
};

class STProductB1: public STAbstractProductB
{
public:
        virtual void eat()
        {
                cout<< "eat ProductB1............"<< endl;
        }
};

class STProductB2: public STAbstractProductB
{
public:
        virtual void eat()
        {
                cout<< "eat ProductB2............"<< endl;
        }
};

class STAbstractFactory
{
public:
        virtual STAbstractProductA* CreateProductA() = 0;
        virtual STAbstractProductB* CreateProductB() = 0;
};

class STConcreteFactoryA: public STAbstractFactory
{
public:
        virtual STAbstractProductA* CreateProductA()
        {
                return new STProductA1;
        }
        virtual STAbstractProductB* CreateProductB()
        {
                return new STProductB1;
        }
};

class STConcreteFactoryB: public STAbstractFactory
{
public:
        virtual STAbstractProductA* CreateProductA()
        {
                return new STProductA2;
        }
        virtual STAbstractProductB* CreateProductB()
        {
                return new STProductB2;
        }
};

int main(int argc, char* argv[])
{
        STAbstractFactory* fc = new STConcreteFactoryA();
        STAbstractProductA* pa = fc->CreateProductA();
        STAbstractProductB* pb = fc->CreateProductB();

        pa->use();
        pb->eat();

        STAbstractFactory* fc2 = new STConcreteFactoryB();
        STAbstractProductA* pa2 = fc2->CreateProductA();
        STAbstractProductB* pb2 = fc2->CreateProductB();

        pa2->use();
        pb2->eat();

        return 0;
}
////////////////////////////////////////
[root@ ~/learn_code/design_pattern/9_abstract_factory]$ ./abstract_factory       
use ProductA1............
eat ProductB1............
use ProductA2............
eat ProductB2............