#include<iostream>
#include <math.h>
using namespace std;
int main()
{	float R,H,vw,vk,vs;
	int cyfra;
	const float PI=3.14;
	cout<<"Program oblicza objetosc bryly"<<endl;
	cout<<"Jesli chcesz wzor na objetosc walca wcisnij-1, stozka-2, kuli-3"<<endl;
	cin>>cyfra;
	switch(cyfra)
	{case 1:
	       cout<<"Wzor na objetosc walca to: V=PI*R*R*H"<<endl;
		   while(1)
		   {cout<<"Podaj wysokosc bryly:";
		   cin>>H;
		   if(H>0)break;
		   if(H<=0)continue;
		   }
		   while(1)
		   {cout<<"Podaj promien bryly:";
	       cin>>R;
	       if(R>0)break;
	       if(R<=0)continue;
		   }
		   vw=PI*R*R*H;
		   cout<<"vw="<<vw<<endl;
	break;
	case 2:
	       cout<<"Wzor na objetosc stozka to: V=1/3*PI*R*R*H"<<endl;
		   while(1)
		   {cout<<"Podaj wysokosc bryly:";
		   cin>>H;
		   if(H>0)break;
		   if(H<=0)continue;
		   }
		   while(1)
		   {cout<<"Podaj promien bryly:";
	       cin>>R;
	       if(R>0)break;
	       if(R<=0)continue;
		   }
		   vs=1/3*PI*R*R*H;
		   cout<<"vs="<<vs<<endl;

	break;
	case 3:
	       cout<<"Wzor na objetosc kuli to: V=4/3*PI*R*R*R"<<endl;
		   while(1)
		   {cout<<"Podaj promien bryly:";
	       cin>>R;
	       if(R>0)break;
	       if(R<=0)continue;
		   }
		   vk=(4/3)*PI*R*R*R;
		   cout<<"vk="<<vk<<endl;
	break;
	default:
        cout << "Podano zla cyfre" <<endl;
        break;
	}

	system("pause");
}