is_valid_number
if (*ac <= 0 || !is_valid_number(av[0]))
if (*ac <= 0 || !is_valid_number(av[0]))
if (*ac <= 0 || !is_valid_number(av[0]))
if (*ac <= 0 || !is_valid_number(av[0]))
if (*ac <= 0 || !is_valid_number(av[0]))
if (*ac <= 0 || !is_valid_number(av[0]))
if (*ac <= 0 || !is_valid_number(av[0]))
if (*ac <= 0 || !is_valid_number(av[0]))
if (*ac <= 0 || !is_valid_number(av[0]))
if (!is_valid_number(arg))
if (!is_valid_number(name) || !is_valid_number(arg))