import java.util.Scanner;
class Shape
{
public double width;
public double length;
public double high;
public double bottom;
public double radius;
public double area;
public double getarea()
{
return area;
}
}class Triangle extends Shape
{
public double getarea()
{
area=(high*bottom)/2;
return area;
}
}
class Rectangle extends Shape
{
public double getarea()
{
area=width*length;
return area;
}
}
class Circle extends Shape
{
public double getarea()
{
area=3.14*radius*radius;
return area;
}
}
public class test
{
public static void main(String[] args)
{
Scanner scanner1 =new Scanner(System.in);
String line=scanner1.nextLine();
Triangle T=new Triangle();
Rectangle R=new Rectangle();
Circle C=new Circle();
if(line.equals(T))
{
Scanner scanner2 =new Scanner(System.in);
T.high= scanner2.nextDouble();
Scanner scanner3 =new Scanner(System.in);
T.bottom=scanner3.nextDouble();
T.getarea();
System.out.println(T.getarea());
}
if(line.equals(R))
{
Scanner scanner4 =new Scanner(System.in);
R.width= scanner4.nextDouble();
Scanner scanner5 =new Scanner(System.in);
R.length= scanner5.nextDouble();
System.out.println(R.getarea());
}
if(line.equals(C))
{
Scanner scanner6 =new Scanner(System.in);
C.radius= scanner6.nextDouble();
System.out.println(C.getarea());
}
}
}
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標籤：Eclipse
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