第二次Java作业

package AAA;
import java.util.*;
         
public class Person {
     public static void main(String[]args){
        final double PI=3.14;
    
        Scanner reader=new Scanner(System.in);
         double r,s,m;
         System.out.println("请输入圆的半径");
         r=reader.nextDouble();
         s=r*PI;
         m=r+100;
         System.out.println("半径r加密后数字为；");
         System.out.println(m);  
         if(r%2==0)               
          System.out.println("半径r是偶数");  
        else   
          System.out.println("半径r是奇数");
        
          System.out.println("圆的面积为");
          System.out.println(s);
   
     } }