GESP 2026年9月 C++六级 单选题 第1题

class Animal {
    public:
    virtual void speak() {
        cout << "Animal ";
    }
    virtual ~Animal() = default;
};

class Cat : public Animal {
    public:
    void speak() override {
        cout << "Cat ";
    }
};

int main() {
    Animal *p = new Cat();
    p->speak();
    delete p;
    return 0;
}

• A. Animal
• B. Cat
• C. Animal Cat
• D. 编译错误

正确答案：B