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853天前import java.util.Scanner; |
public class Main { |
public static void main(String[] args) { |
Scanner scan = new Scanner(System.in); |
double r_c1 = scan.nextDouble(); |
double r_c2 = scan.nextDouble(); |
scan.close(); |
Circle c1 = new Circle(); |
c1.setR(r_c1); |
System.out.println(c1.getArea()); |
System.out.println(c1.getPerimeter()); |
Circle c2 = new Circle(r_c2); |
System.out.println(c2.getArea()); |
System.out.println(c2.getPerimeter()); |
} |
} |
class Circle |
{ |
private double r; |
public Circle(double a) |
{ |
r = a; |
} |
public Circle() |
{ |
r = 0; |
} |
public void setR(double a) |
{ |
r = a; |
} |
public double getPerimeter() |
{ |
return 2*3.14*r; |
} |
public double getArea() |
{ |
return 3.14*r*r; |
} |
} |
