}
    public static void main(String[] av) {        Sum c = new Sum();        switch(av.length) {            case 0: c.process("Stdin", new BufferedInputStream(                        new DataInputStream(System.in))); break;            default:		for (int i=0; i<av.length; i++)                    try {                        c.process(av[i],						new BufferedInputStream(new FileInputStream(av[i])));                    } catch (FileNotFoundException e) {                        System.err.println(e);                    }        }    }