Box It!

class Box
{
  long l, b, h;
    
    public:
        Box();
        Box(int length, int breadth, int height): l(length), b(breadth), h(height){};
        Box(const Box&);
    
        int getLength() const {return l;};
        int getBreadth() const {return b;};
        int getHeight() const {return h;};
        long CalculateVolume() {return l*b*h;};
    
        friend ostream& operator<<(ostream& out, const Box& B);
        friend bool operator<(const Box& a, const Box& b);
};

ostream& operator<<(ostream& out, const Box& B)
{
    out<<B.l<<" "<<B.b<<" "<< B.h;
    return out;
}

bool operator<(const Box& a, const Box& b)
{
    if (a.getLength()<b.getLength()) return true;
    if (a.getBreadth()<b.getBreadth() && a.getLength()==b.getLength()) return true;
    if (a.getHeight()<b.getHeight() && a.getLength()==b.getLength() && a.getBreadth()==b.getBreadth()) return true;
    return false;    
}

Box::Box(const Box& toCopy)
{
    l = toCopy.getLength();
    b = toCopy.getBreadth();
    h = toCopy.getHeight(); 
}

Box::Box()
{
    l = 0;
    b = 0;
    h = 0;
}