#define SIZE_BUFFER 1024
do_it_one_at_a_time(char *format, ...)
   {
   int length;
   int i;
   va_list arg_ptr;
   va_start(arg_ptr, format);
   char buffer[SIZE_BUFFER];
   length = vsprintf(buffer, format, arg_ptr);

   for (i = 0; i < length; i++)
       {
       do_it_for_one(buffer[i]);
       }
   
   va_end(arg_ptr);
   }
