Function usage

lib_acl_cpp/samples/json/json12/json.cpp:69–75

}

static void usage(const char* procname)
{
	printf("usage: %s -h [help]\r\n"
		"  -o [if parsing once]\r\n"
		"  -n name\r\n"
		"  -f json_file\r\n", procname);
}

int main(int argc, char* argv[])
{