补考：第二题

import java.util.Scanner;
class Circle{
    private double radius;
    Circle(double radius){
        this.radius=radius;
    }
    Circle(){
        radius=0;
    }
    double getRadius(){
        return radius;
    }
    void setRadius(double r){
        radius=r;
    }
    double getArea(){
        return Math.PI*radius*radius;
    }
    double getPerimeter(){
        return 2*Math.PI*radius;
    }
    public String toString(){
        return "Circle(r:"+radius+")";
        
    }
}
class Cylinder{
    private double height;
     private Circle circle;
    Cylinder(double height,Circle circle){
        this.height=height;
        this.circle=circle;
    }
    Cylinder(){
        height=0;
         circle.setRadius(0);
    }
    double getHeight(){
        return height;
    }
    void setHeight(double height){
        this.height=height;
    }
    Circle getCircle(){
        return circle;
    }
    void setCircle(Circle circle){
        this.circle=circle;
    }
    double getArea(){
        return 2*Math.PI*circle.getRadius()*circle.getRadius()+circle.getPerimeter()*height;
    }
    double getVolume(){
        return circle.getArea()*height;
    }
    public String toString(){
        return "Cylinder(h:"+height+","+circle.toString()+")";
    }
}
public class Main{
    public static void main(String args[]) {
        Scanner input = new Scanner(System.in);
        int n = input.nextInt();
        for(int i = 0; i < n; i++) {
            String str = input.next();
            if(str.equals("Circle")) {
                Circle c = new Circle(input.nextDouble());
                System.out.println("The area of " + c.toString() + " is " + String.format("%.2f",c.getArea()));
                System.out.println("The perimeterof " + c.toString() + " is "+ String.format("%.2f",c.getPerimeter()));
            } else if(str.equals("Cylinder")) {
                Cylinder r = new Cylinder(input.nextDouble(), new Circle(input.nextDouble()));
                System.out.println("The area of " + r.toString() + " is " + String.format("%.2f",r.getArea()));
                System.out.println("The volume of " + r.toString() + " is " + String.format("%.2f",r.getVolume()));
            }
        }
    }
}