Re: Random Number Generator

[Toon Moene <toon at moene dot indiv dot nluug dot nl>]

Emil Block wrote:

> Toon Moene wrote:
> > G77's actually does:
> >
> > srand(iseed);
> > return rand();
>   i = irand( k ) 
>   r = rand( k ) 
>   d = drand( k ) 
>  
>   k         INTEGER*4                     Input
>                    k=0: Get next random number in the sequence 
>                    k=1: Restart sequence, return first number 
>                    k>0: Use as a seed for new sequence, return first number 
>   rand      REAL*4                        Output
>   drand     REAL*8                        Output
>   irand     INTEGER*4                     Output
>
> No mention of srand but the funtion exists as well as srandom.
>
> Is G77 (rand_.c and srand_.c) doing an additional draw?
Sorry for answering this so late ...

From your description of whan Sun does, I'd say they do the same.  They 
must use *some* function to restart the sequence, and one would hope 
that it were srand.

However, given the current evidence, it's hard to say.  Perhaps you 
could ask Sun ?

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