Need help

[Junjie Xu]

Hi there,
I found I can't generate a random float number(between 0 to 1) use the
following method.
*****************************************************************
module Main where
import System(getArgs)
import Random
 
uni :: Float
uni = head (randoms g)
      where
      g = mkStdGen 77
 
main = print (show (uni))
 
**********************************************
once I run it, it will generate a float number. When I run it again, it
genetrate the same result. I think maybe the cause is that  the seed is
77.

To solve this, I think the seed should be replaced by current time .But I  
don't know how to capture the time.
 
I referenced  the relevant library, but I still have no idea.

Who know the solution, please give me a hand.

Thank you very much.

Kevin Xu