#include <iostream>
#include <cmath>
#include <cstdlib>
using namespace std;

void(double radius,double height,double cyl_vol*,double cyl_surf* );
int main()
{
    double r,h, cv, cs;
    do{
    cout << "input radius"; cin>> r;
    cout << "input height"; cin>> h;
    void(double r,double h,double cv*,double cs* )
    cout << "cylinder volume=" << cv << endl;
    cout << "cylinder surface=" << cs << endl;

    }while(r!=0 || h!=0 )
    return 0;
}
void(double radius,double height,double cyl_vol*,double cyl_surf* )
{
    cyl_vol=(radius*radius*M_PI*height);
    cyl_surf=2*radius*radius*M_PI+ 2*M_PI*radius*height;
}