根據下列的 C++語言程式碼，請問輸出結果為何？ #include <iostream> using namespace std; class CPet { public: void Show() { cout << "Pet"; } }; class CDog : public CPet { public: virtual void Show() { cout << "Dog"; } }; class CSmallDog : public CDog { public: void Show() { cout << "SmallDog"; } }; int main() { CPet aPet; CDog aDog; CSmallDog aSmallDog; CPet* pPet[3] = { &aPet, &aDog, &aSmallDog}; for (int i=0; i<3; i++) pPet[i]->Show(); return 0; }