第三次Java作业

package Hellojava;

import java.util.Scanner ;
  public class yuan{
    public static void main(String[] args) {
        Scanner s=new Scanner(System.in);
        int a=5;
        double i;
        int r=s.nextInt();
        i=r*r*3.14;
        System.out.println("圆的面积为："+s);
    } 
}

package bbb;

import java.util.Scanner;
public class shixun2{
    public static void main(String[] args){
      int i,s,n,a[] = null;
      for(i=0;i<5;i++){
         Scanner zp=new Scanner(System.in);
         n=zp.nextInt();
         a[i]=n;
      } 
      for(i=0;i<5;i++){
          System.out.println(a[i]);
      }
      for(i=0;i<5;i++){
          s=0;
          if(a[i]>s)s=a[i];
          System.out.println("最高分为："+a[i])
      }
    }
}

package bbb;  import java.util.Scanner; public class di3xiaoti {   public static void main(String[] args){    Scanner zp=new Scanner(System.in);    int n;    double S;    n=zp.nextInt();    S=(n*10+5)/2+3.14159;    int s=(int)S;    System.out.println("请输入要加密的数字：");    System.out.println("加密结果为："+s);   }

}

package bbb;
 import java.util.Scanner;
public class di3xiaoti {
     public static void main(String[] args){
         Scanner zp=new Scanner(System.in);
         int n;
         double S;
         n=zp.nextInt();
         S=(n*10+5)/2+3.14159;
         int s=(int)S;
         System.out.println("请输入要加密的数字：");
         System.out.println("加密结果为："+s);
     }

}