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 << "h="; cin >> h;
    cout << "l="; cin >> l;
    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;

}