BufferedWriter carac = null;
try {
  carac = new BufferedWriter(new FileWriter("carac.txt", true));
  for(int i=0; i<c.length; i++) {
    carac.write(c[i]+" ");
    System.out.print(c[i]+" ");
  }
  System.out.println();
  carac.write("\n");
  carac.close(); 

}
catch (IOException e) {
  System.out.println(e.toString());
}