extern int length_main(int argc, char **argv)
{
if (argc != 2 || **(argv + 1) == '-')
usage(length_usage);
printf("%lu\n", (long)strlen(argv[1]));
extern int length_main(int argc, char **argv)
{
if (argc != 2 || **(argv + 1) == '-')
usage(length_usage);
printf("%lu\n", (long)strlen(argv[1]));