fandehui

 

代码:

 1 import java.util.*;
 2 public class Main {
 3     public static void main (String [] args) {
 4         Scanner s=new Scanner(System.in);
 5         double r=s.nextInt();
 6         double h=s.nextInt();
 7         double v=0;
 8         v=3.14*r*r*h;
 9         System.out.println(String.format("%.2f",v));        
10     }
11 }

 

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