import java.util.*;
class Circle {
int radius;
String name;
public Circle() { //생성자
radius=1;
name="";
}
public Circle(int r, String n)
{
radius = r;
name = n;
}
public double getArea( ) { //메소드
return 3.141592653585*radius*radius;
}
}
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
Circle pizza = new Circle(10, "자바피자");
double area = pizza.getArea();
System.out.println(pizza.name + "의 면적은 " + area);
Circle donut = new Circle();
donut.name = "도넛피자";
area = donut.getArea();
System.out.println(donut.name + "의 면적은 " + area);
}
}