($c_speed[0], $c_speed[1], $c_speed[2], $c_speed[3]) = sscanf("%d %d %d %d", $rstring);

##</code><code>##

@c_speed = sscanf("%d %d %d %d", $rstring);

##</code><code>##

@c_speed[0 .. $#c_speed] = split ' ', <$rstring>;