public class Work
{
public static void main(String[]
args)
{
double a,b,s;
a=Math.PI;
b=5.5;
s=a*b*b;
System.out.println("这个圆形的面积是:"+s);
}
}
public class Work
{
public static void main(String[]
args)
{
double a,b,s;
a=Math.PI;
b=5.5;
s=a*b*b;
System.out.println("这个圆形的面积是:"+s);
}
}