How to find volume of cylinder and volume of cone using getters and setters?

CODE

How to find volume of cylinder and volume of cone using getters and setters?

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

#include<iostream>

using namespace std;

class vol

{

    float r,h,v;

    public:

    void setValue(float r1,float h1)

    {

        r=r1;

        h=h1;

    }

    void cyl()

    {

        v=3.14*r*r*h;

    }

    void cone()

    {

        v=3.14*r*r*h/3;

    }

    float getValue()

    {

        return v;

    }

};

int main()

{

    int ch;

    float r1,h1,v;

    vol obj;

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

    cin>>ch;

    switch(ch)

    {

    case 1:

        cout<<"\n enter radius and height of cylinder:";

        cin>>r1>>h1;

        obj.setValue(r1,h1);

        obj.cyl();

        v=obj.getValue();

        cout<<"\n volume of cylinder:"<<v;

        break;

    case 2:

        cout<<"\n enter radius and height of cone:";

        cin>>r1>>h1;

        obj.setValue(r1,h1);

        obj.cone();

        v=obj.getValue();

        cout<<"\n volume of cone:"<<v;

        break;

    default:

        cout<<"\n wrong choice";

        break;

    }

}

Output:
press 1 for volume of cylinder

 press 2 for volume of cone

 1

 enter radius and height of cylinder:3

5

 volume of cylinder:141.3