NFILES
for (i = iback + 1; i < NFILES; i++) {
errx(1, "readdir %i returned %s", NFILES, f->d_name);
createfiles(NFILES);
for (iend = 0; iend < NFILES; iend++)
createfiles(NFILES);
for (i = 0; i < NFILES; i++)
longloop(dp, (i + NFILES/2) % NFILES);
if (nfiles < NFILES) {
char *outfiles[NFILES]; /* output file names */