import java.io.*;
public class  Ks1
{
 public static void main(String args[]) throws IOException
     {
   FileWriter fw=new FileWriter("d:\\a.txt");
         int i,j,a,k=1,s=0,wdy;
         int ss[]=new int[500];
         for(i=1;i<=200;i++)
          {
     a=(int)(Math.random()*1000+1);
              for(j=2;j<a;j++)
               {
       if(a%j==0)
                   break;
               }
                   if(j==a)
                    {

                       s=s+a;
                       ss[k]=a;
                       k++;
                     }
           }
     for(i=1;i<k-1;i++)
      for(j=1;j<k-1;j++)
        if(ss[j]>=ss[j+1])
         {
    wdy=ss[j];
             ss[j]=ss[j+1];
             ss[j+1]=wdy;
       }
            for(i=1;i<k;i++)
             {

          fw.write(Integer.toString (ss[i]));
                fw.write(",");}
                fw.write("个数为"+Integer.toString( k-1)+""+"个,");
                fw.write( "素数平均书为"+Integer.toString(s/(k-1))+" 。");
                fw.close();
             }
  }

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