struct TwoRealNums
{
    double n1;
    double n2;
};

TwoRealNums CylSurfaceAreaVol(int R, int H)
{
    // Surface area = 2*pi*R^2 + 2*pi*R*H
    // Volume = pi * R^2 * H
    const double PI = 3.141592653589793;
    TwoRealNums result;
    result.n1 = 2.0*PI*R*R + 2.0*PI*R*H;         // surface area
    result.n2 = PI * R * R * H;                  // volume
    return result;
}