"leave 0 for default behaviour]\n"
"[--" OPT_ITER_NUM "=<number of iterations to perform>]\n"
"[--" OPT_VERBOSE "=<verbose level>]\n"
"leave 0 for default behaviour]\n"
"[--" OPT_ITER_NUM "=<number of iterations to perform>]\n"
"[--" OPT_VERBOSE "=<verbose level>]\n"