public static void addfi(int[] b) throws IOException{
      String newf;
      System.out.print("Que nomes queres para o ficheiro pah?: ");
      newf=sc.next();
      PrintWriter writer = new PrintWriter(newf);

      for(int i=0; i<b.length; i++){
        if (b[i]==0) break;
        writer.println(b[i]);
        }

    writer.close();


     }