public class Cylinder implements ICylinder {
	double r; 
	double h; 
	public Cylinder(double r, double h) { 
		this.r = r;
		this.h = h;
	}
	public double area() { 
		return 2 * PI * r * (h + r);
	}
	public double bulk() { 
		return PI * r * r * h; 
	}
	public static void main(String args[]) {
		ICylinder c1 = new Cylinder(10, 6); 
		double arearesult;
		arearesult = c1.area();
		double bulkresult;
		bulkresult = c1.bulk();
		System.out.println("Ϊ" + arearesult);
		System.out.println("Ϊ" + bulkresult);
	}
}