c++实现工厂方法模式时的错误(vc6)

[xiyuxi2001]

我在用工厂方法模式用vc6实现时编译出错一共三个文件
factory.h
class Product
{
};

class ConcreteProduct1 : public Product
{
public:
ConcreteProduct1()
{
cout<<"CocnreteProduct1 is being created.";
}
};

class ConcreteProduct2 : public Product
{
public:
ConcreteProduct2()
{
cout<<"CocnreteProduct2 is being created.";
}
}
creator.h

class Creator
{
public:
virtual ~Creator(){};
virtual Product factory() = 0;
};

class ConcreteCreator1 : public Creator
{
public:
Product factory()
{
return new ConcreteProduct1();
}
};

class ConcreteCreator2 : public Creator
{
public:
Product factory()
{
return new ConcreteProduct2();
}
};
main.h
int main(int argc, char* argv[])
{
Creator *creator1, *creator2;
Product *prod1, *prod2;

creator1 = new ConcreteCreator1();
prod1 = creator1->factory();

creator2 = new ConcreteCreator2();
prod2 = creator2->factory();

return 0;
}

[xiyuxi2001]

我用上面的方法实现工厂方法模式但编译时出现错误，提示如下:
error C2236: unexpected 'class' 'Creator'
error C2143: syntax error : missing ';' before '{'
error C2447: missing function header (old-style formal list?)
error C2504: 'Creator' : base class undefined
但我察看代码没有错误，而且也定义拉类，并包含拉头文件。不知道那里错啦。