摘要：
#include using namespace std;#define DESTORY_POINTER(ptr) if (ptr) { delete ptr; ptr = NULL; }class ProductFamilyA{public: virtual ~ProductFamilyA(... 阅读全文
摘要：
class Product{public: virtual ~Product() {} virtual void DoSomething()=0;};class ProductA : public Product{public: ProductA() {} ~ProductA... 阅读全文