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#1 (permalink)

05-09-2003

asutoshch

Registered User

Join Date: Mar 2001

Location: Calcutta, India

Posts: 49

random number logic -- issue

I use standard C random number generation logic in my application.

Code:

long nCounter; 
long lRndNo; 
char rand[11]; 

srand48(nCounter); 
lRndNo = lrand48(); 
sprintf(rand,"%010.10d",lRndNo);

However we always find that the rand generated starts with '0','1' or '2'. I could not logically prove if is guaranteed to start with these. We are designing a new program with the assumption that it will not start with '5'.

Can someone please explain how this logic (linear conguential) works to start with '0','1','2'?
I will highly appreciate.
Thanks
Asutosh

Last edited by Yogesh Sawant; 08-17-2009 at 08:34 AM.. Reason: added code tags

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