Thread: Volume always coming 0

In a nutshell,this is the code of the area,lateral area and volume of a cone from a class structure -:

Code:

else if(g[0] == 'N' || g[0] == 'n')
                        {
                               cout << "Enter radius of the cone - ";
                               cin >> a;
                               cout << "\nEnter slant height of the cone - ";
                               cin >> b;
                               cout << "\nEnter perpendicular height of the cone - ";
                               cin >> x;
                               float Area = (M_PI * a) * (a + b);
                               float L_area = M_PI * a * b;
                               float Volume = 1/3 * M_PI * pow(a,2) * x;
                               cout << "\nThe CSA is " << L_area << endl;
                               cout << "The TSA is " << Area << endl;
                               cout << "The volume is " << Volume << endl;
                        }

But the volume keeps coming 0 for whatever value I put..I don't seem to find anything wrong..help please