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Release calc version 2.11.0t5
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help/seed
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help/seed
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NAME
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seed - return a value that may be used to seed a pseudo-random generator
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SYNOPSIS
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seed()
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TYPES
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return integer
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DESCRIPTION
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Generate a pseudo-random seed based on a collection of system and process
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information. The seed() builtin function returns a value:
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0 <= seed < 2^64
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IMPORTANT WARNING:
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It should be pointed out that the information collected by seed
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is almost certainly non-chaotic. This function is likely not
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suitable for applications (such as cryptographic applications)
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where the unpredictability of seeds is critical. For such critical
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applications, lavarand should be used. Seed:
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http://lavarand.sgi.com
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for information about seeding a pseudo-random number generator
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(such as rand() or random()) with the cryptographic hash of the
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digitization of chaotic system.
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Given the above warning, this builtin function produces a seed that is
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suitable for most applications that desire a different pseudo-random
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sequence each time they are run.
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The return value of this builtin function should NOT be considered
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a random or pseudo-random value. The return value should be used
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as an argument to a seed function such as srand() or srandom().
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EXAMPLE
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> print srand(seed())
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RAND state
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> print srandom(seed())
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RAND state
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LIMITS
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none
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LIBRARY
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NUMBER *pseudo_seed(void)
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SEE ALSO
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seed, srand, randbit, isrand, rand, random, srandom, israndom
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