lab1_n4

#include <math.h>
#include <conio.h>
#include <iostream>
using namespace std;
#define M_PI acos(-1.0)
int main()
{
	double s, R, r, l, h, v;
	cout << "r="; cin >> r;
	cout << "R="; cin >> R;
	cout << "l="; cin >>l;
	cout << "h="; cin >> h;
	s = M_PI*(R+r)*l+M_PI*pow(R,2)+M_PI*pow(r,2);
	cout <<"s="<<s<<"\n";
	v = (1. / 3) * (pow(R, 2) + pow(r, 2) + R * r) * h * M_PI;
	cout <<"v=" << v << "\n";

	return 0;

}