HackerRank Problem Box It! In C++

BoxItHackerRank.cpp

#include<bits/stdc++.h>

using namespace std;
 
class Box{
    private:
    int l, b, h;
    public:
    Box(){
        this->l = this->b = this->h = 0;
    }
    Box(int length, int breadth, int height){
        this->l = length;
        this->b = breadth;
        this->h = height;
    }
    int getLength() { return this->l; }
    int getBreadth() { return this->b; }
    int getHeight() { return this->h; }

    long long CalculateVolume() { 
    return (long long)(l)*b*h; }

    Box(Box &B){
        l = B.l;
        b = B.b;
        h = B.h;
    }
    bool operator < (Box &B){
        if(l < B.l){
            return true;
        }else if(b < B.b && l == B.l){
            return true;
        }else if(h < B.h && b == B.b && h == B.h){
            return true;
        }
        return false;
    }
};
ostream &operator<<(ostream &out, Box &B) {
  out << B.getLength() << " " << B.getBreadth() << " " << B.getHeight();
  return out;
}

void check2()
{
	int n;
	cin>>n;
	Box temp;
	for(int i=0;i<n;i++)
	{
		int type;
		cin>>type;
		if(type ==1)
		{
			cout<<temp<<endl;
		}
		if(type == 2)
		{
			int l,b,h;
			cin>>l>>b>>h;
			Box NewBox(l,b,h);
			temp=NewBox;
			cout<<temp<<endl;
		}
		if(type==3)
		{
			int l,b,h;
			cin>>l>>b>>h;
			Box NewBox(l,b,h);
			if(NewBox<temp)
			{
				cout<<"Lesser\n";
			}
			else
			{
				cout<<"Greater\n";
			}
		}
		if(type==4)
		{
			cout<<temp.CalculateVolume()<<endl;
		}
		if(type==5)
		{
			Box NewBox(temp);
			cout<<NewBox<<endl;
		}

	}
}

int main()
{
	check2();
}