/*
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner t = new Scanner(System.in);
int a = t.nextInt();
int b = t.nextInt();
int [][]map = new int[a][b];
System.out.println(a+b);
System.out.print("asdasd");
System.out.print("asdasd\n");
System.out.print("asdasd");
System.out.printf("%d %d", a, b);
System.out.println(a+" "+b);
for(int i=0; i<a; i++) {
}
}
}
*/
//import java.util.Scanner;
//
//class sum {
// void talk() {
// System.out.println("HELLO");
// }
// void show() {
// System.out.println("ASDASDS");
// }
//}
/*
import java.util.*;
public class Main{
public static void main(String[] args) {
Scanner t = new Scanner(System.in);
// sum s = new sum();
// s.show();
//
int n = t.nextInt();
int a =0;
for(int i=0; i<n; i++)
{
int k = t.nextInt();
if(k%5==0)
{
a += k;
}
}
System.out.println(a);
}
}
*/
/*
import java.util.*;
public class Main{
public static void main(String[] args) {
Scanner t = new Scanner(System.in);
int n = t.nextInt();
int a=0;
for(int i=0; i<n; i++)
{
int k = t.nextShort();
if(k%2==0)
{
a++;
}
}
System.out.println(a);
}
}
*/
//import java.util.*;
//public class Main{
// public static void main(String[] args)
// {
// Scanner t = new Scanner(System.in);
//
//// int [][]map = new int[a][b];
//
// int n = t.nextInt();
// int []map = new int[n];
//
// for (int i=0; i<n; i++)
// {
// int k = t.nextInt();
// map[i] = k;
// }
//
// for(int i=0; i<n; i++)
// {
// for(int j=i; j<i+n; j++)
// {
// System.out.print(map[j%n]+" ");
// }
// System.out.println();
// }
//
// }
//}
/*
* 1. Class (CLEAR)
* 2. Constructor
* 9. public, private, protected, default
* 3. Method Overloading
* 4. Method Overriding
* -> Inheritence(상속)
* 5. Casting
* 6. Abstract
* 7. Interface
* 8. Collection Framework
*/
/*
import java.util.*;
class hello {
// field > variable
int a, b, c;
hello() {
// constructor
a = 0;
b = 0;
c = 0;
System.out.println("Initalized 1");
}
hello(int a, int b, int c) {
this.a = a;
this.b = b;
this.c = c;
System.out.println("Init 2");
}
// method > function
void talk() {
}
int calcu(int a, int b) {
return a+b;
}
}
public class Main {
public static void main(String[] args) {
hello h = new hello();
hello p = new hello(10, 20, 30);
}
}
*/
import java.util.*;
public class Circle{
int radius;
String name;
public Circle() {
radius = 1; name = "";
}
public Circle(int r, String n) {
radius = r; name = n;
}
public double getArea() {
return 3.14*radius*radius;
}
public static void Main(String[] args){
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);
}
}