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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 length = scan.nextDouble(); |
Square s = new Square(length); |
System.out.printf("%.2f ",s.getPerimeter()); |
System.out.printf("%.2f",s.getArea()); |
System.out.println(); |
|
length = scan.nextDouble(); |
double wide = scan.nextDouble(); |
Rectangle r = new Rectangle(length,wide); |
System.out.printf("%.2f ",r.getPerimeter()); |
System.out.printf("%.2f",r.getArea()); |
System.out.println(); |
|
double radius = scan.nextDouble(); |
Circle c = new Circle (radius); |
System.out.printf("%.2f ",c.getPerimeter()); |
System.out.printf("%.2f ",c.getArea()); |
|
scan.close(); |
} |
} |
abstract class Shape |
{ |
public abstract double getPerimeter(); |
public abstract double getArea(); |
} |
class Square extends Shape |
{ |
private double length; |
public Square(double l) |
{ |
length = l; |
} |
public double getLength() |
{ |
return length; |
} |
public double getPerimeter() |
{ |
return length*4; |
} |
public double getArea() |
{ |
return length*length; |
} |
} |
class Rectangle extends Square |
{ |
private double wide; |
public Rectangle(double l, double w) |
{ |
super(l); |
wide = w; |
} |
public double getPerimeter() |
{ |
return (super.getLength()+wide)*2; |
} |
public double getArea() |
{ |
return super.getLength()*wide; |
} |
} |
class Circle extends Shape |
{ |
private double r; |
public Circle(double _r) |
{ |
r = _r; |
} |
public double getPerimeter() |
{ |
return 3.14159*r*2; |
} |
public double getArea() |
{ |
return 3.14159*r*r; |
} |
} |
