[R] About function "unif_rand()"

[xt_wang@cs.concordia.ca]

hello, everybody,

I met a problem that I want to generate a random uniform number by using 
function with c interface. 

What I found is only "unif_rand()", but its range is [0,1]. How can I create a 
uniform random variable by using a function with c interface.

Who can tell me what function it is and how to use?

I will appreciate for it very much.

Thanks in advance!

xiaotong wang