C++简单类 与 PHP相似之处

class cBox {
    public:
        double m_Length;
        double m_Width;
        double m_Height;

        double Volume(void);
};

int main() {

    cBox box1;
    cBox box2;

    double boxVolume(0.0);

    box1.m_Height = 18.0;
    box1.m_Length = 78.0;
    box1.m_Width = 24.0;

    box2.m_Height = box1.m_Height - 10;
    box2.m_Length = box1.m_Length / 2.0;
    box2.m_Width  = 0.25 * box1.m_Length;

    boxVolume = box1.Volume();

    cout << endl
        << "Volume of box1 = " << boxVolume;
    cout << endl
        << "box2 has sides which total "
        << box2.Volume() << " inches." << endl;

    cout << "A CBOx:" << sizeof box1 << " bytes." << endl;

    return 0;
}

double cBox::Volume() {
    return m_Length * m_Width * m_Height;
}

//result
33696
6084
24