How to find volume of cylinder and volume of cone?

CODE

How to find volume of cylinder and volume of cone?

//Write a program to find volume of cylinder and volume of cone…

#include<iostream>

using namespace std;

class vol

{

    float r,h,v;

    public:

    void input()

    {

        cout<<"\n radius:";

        cin>>r;

        cout<<"\n height:";

        cin>>h;

    }

    void cyl()

    {

        v=3.14*r*r*h;

    }

    void cone()

    {

        v=3.14*r*r*h/3;

    }

    void out()

    {

        cout<<"\n volume:"<<v;

    }

};

int main()

{

    int ch;

    vol obj;

    cout<<"\n press 1 for volume of cylinder \n press 2 for volume of cone\n ";

    cin>>ch;

    switch(ch)

    {

    case 1:

        obj.input();

        obj.cyl();

        obj.out();

        break;

    case 2:

        obj.input();

        obj.cone();

        obj.out();

        break;

    default:

        cout<<"\n wrong choice";

        break;

    }

}

Output:

press 1 for volume of cylinder

 press 2 for volume of cone

 2

 radius:4

 height:2

 volume:33.4933