//统计实例的个数
#include<iostream>

using std::cout;
using std::endl;

class MYCBox
{
public:
    static int objectCount;    
    MYCBox()
    {
        cout<<endl
            <<"Default constructor called.";
        m_Length=m_Width=m_Height=1.0;
        objectCount++;
    }
      MYCBox(double lv,double bv=1.0,double hv=1.0)
    {
        cout<<endl<<"Constructor called.";

        m_Length=lv;
        m_Width=bv;
        m_Height=hv;
        objectCount++;
    }

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


private:
    double m_Length;
    double m_Width;
    double m_Height;

};

int main()
{
    MYCBox boxes[5];
    MYCBox cigar(8.0,5.0,1.0);

    cout<<endl<<endl
        <<"Number fo objects (through class) = "
        <<MYCBox::objectCount;
    cout<<endl
        <<"Number of objects (through object) = "
        <<boxes[2].objectCount;

    return 0;
}