Finding location in rand()

This is a discussion on Finding location in rand() within the C++ Programming forums, part of the General Programming Boards category; Given a large enough set of numbers is it possible to determine the seed and location in the rand() function ...

  1. #1
    Registered User
    Join Date
    Aug 2004
    Posts
    4

    Finding location in rand()

    Given a large enough set of numbers is it possible to determine the seed and location in the rand() function found in <cstdlib> and seeded using srand?

    I know I can find the seed given the first few numbers (maybe there is a possibility of duplicates but I haven't had that problem) but what if the numbers are located after rand() has been called numerous times.

    If anyone can give me the formula used to calculate the rand() function I might be able to solve this problem.

    Any help would be appreciated.
    Thanks

  2. #2
    & the hat of GPL slaying Thantos's Avatar
    Join Date
    Sep 2001
    Posts
    5,681
    Is it possible? Sure.

    As for the formula that would be implamentation defined.

Popular pages Recent additions subscribe to a feed

Similar Threads

  1. rand() implementation
    By habert79 in forum C Programming
    Replies: 4
    Last Post: 02-07-2009, 01:18 PM
  2. Finding EXE Location
    By Trent_Easton in forum C Programming
    Replies: 2
    Last Post: 06-18-2005, 09:01 AM
  3. instantiated from here: errors...
    By advocation in forum C++ Programming
    Replies: 5
    Last Post: 03-27-2005, 09:01 AM
  4. I need help with templates!
    By advocation in forum C++ Programming
    Replies: 6
    Last Post: 03-26-2005, 09:27 PM
  5. Im so lost at . .
    By hermit in forum C Programming
    Replies: 18
    Last Post: 05-15-2002, 02:26 AM

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21