Read integer from console and sleep

[Iain]

I tried to use the sleep function from the Rosetta Code project: 
http://rosettacode.org/wiki/Sleep#D

Am I right in thinking this is D1 code, as it will not compile 
under 2.059?

So, I tried writing my own version, and hit my head against many 
brick walls along the way.  My result takes more lines than C, 
C++ or C#, so I'm guessing it can't be the best solution.

Could anyone explain how to optimise the code below before I post 
it to Rosetta?

-----------------
import std.stdio;
import std.conv;
import std.string;
import core.thread;

void main()
{
   write("Enter a time to sleep (in seconds): ");
   string input = stdin.readln(); // have to make this a string 
first, it can't go directly into parse!
   auto time = parse!long(input); // have to use parse!, as to! 
crashes when it sees a \n
   writeln("Sleeping...");
   Thread.sleep( dur!("seconds")(time) );
   writeln("Awake!");
}


Many thanks!