A22041. 关于以下代码，说法正确的是（ ）。class Instrument { public: void play() { cout << "乐器在演奏声音" << endl; } virtual ~Instrument() {}; }; class Piano : public Instrument { public: void play() override { cout << "钢琴：叮咚叮咚" …

关于以下代码，说法正确的是（    ）。

class Instrument {
public:
    void play() {
        cout << "乐器在演奏声音" << endl;
    }
    virtual ~Instrument() {};
};

class Piano : public Instrument {
public:
    void play() override {
        cout << "钢琴：叮咚叮咚" << endl;
    }
};

class Guitar : public Instrument {
public:
    void play() override {
        cout << "吉他：咚咚当当" << endl;
    }
};

int main() {
    Instrument* instruments[2];
    instruments[0] = new Piano();
    instruments[1] = new Guitar();
    for (int i = 0; i < 2; ++i) {
        instruments[i]->play();
    }
    for (int i = 0; i < 2; ++i) {
        delete instruments[i];
    }
    return 0;
}