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() = ;
 };

 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() = ;
 };

 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() = ;
         virtual STAbstractProductB* CreateProductB() = ;
 };

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