#include 
    using namespace std;
    class BoxExample
    {   
        double L;
        double B;
        double H;
        public:
        double getVol(void)
        {  
            return L * B * H;
        }
        void setL( double length )
        {   
            L = length;
        }
        void setB( double breadth )
        {   
            B = breadth;
        }
        void setH( double height )
        {   
            H = height;
        }
        BoxExample operator+(const BoxExample& b)
        {  
            BoxExample box;
            box.L = this->L + b.L;
            box.B = this->B + b.B;
            box.H = this->H + b.H;
            return box;
        } 
    };
    int main( )
    {  
        BoxExample BoxA,BoxB,BoxC;
        double vol = 0.0;
        BoxA.setL(6.0);
        BoxA.setB(7.0);
        BoxA.setH(5.0);
        BoxB.setL(12.0);
        BoxB.setB(13.0);
        BoxB.setH(10.0);
        vol = BoxA.getVol();
        cout << "Volume of BoxA : " << vol <        vol = BoxB.getVol();
        cout << "Volume of BoxB : " << vol <        BoxC = BoxA + BoxB;
        vol = BoxC.getVol();
        cout << "Volume of BoxC : " << vol <        return 0;
    }