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boost::random::rand48
// In header: <boost/random/linear_congruential.hpp> class rand48 { public: // types typedef ; // construct/copy/destruct (); (); template<typename SeedSeq> (); template<typename It> (, ); // public static functions (); (); // public member functions (); (); template<typename It> (, ); template<typename SeedSeq> (); (); (); template<typename Iter> (, ); // friend functions template<typename CharT, typename Traits> (, rand48 &); template<typename CharT, typename Traits> (, rand48 &); (rand48 &, rand48 &); (rand48 &, rand48 &); // public data members static has_fixed_range; };
Class rand48
models a pseudo-random number generator . It uses the linear congruential algorithm with the parameters a = 0x5DEECE66D, c = 0xB, m = 2**48. It delivers identical results to the lrand48()
function available on some systems (assuming lcong48 has not been called).
It is only available on systems where uint64_t
is provided as an integral type, so that for example static in-class constants and/or enum definitions with large uint64_t
numbers work.
rand48
public
construct/copy/destruct();
Seeds the generator with the default seed.
( x0);
Constructs a rand48
generator with x(0) := (x0 << 16) | 0x330e.
template<typename SeedSeq> ( seq);
Seeds the generator with values produced by seq.generate()
.
template<typename It> ( first, last);
Seeds the generator using values from an iterator range, and updates first to point one past the last value consumed.
rand48
public member functions();
Seeds the generator with the default seed.
( x0);
Changes the current value x(n) of the generator to (x0 << 16) | 0x330e.
template<typename It> ( first, last);
Seeds the generator using values from an iterator range, and updates first to point one past the last value consumed.
template<typename SeedSeq> ( seq);
Seeds the generator with values produced by seq.generate()
.
();
Returns the next value of the generator.
( z);
Advances the state of the generator by z
.
template<typename Iter> ( first, last);
Fills a range with random values
rand48
friend functionstemplate<typename CharT, typename Traits> ( os, rand48 & r);
Writes a
to a rand48
std::ostream
.
template<typename CharT, typename Traits> ( is, rand48 & r);
Reads a
from a rand48
std::istream
.
(rand48 & x, rand48 & y);
Returns true if the two generators will produce identical sequences of values.
(rand48 & x, rand48 & y);
Returns true if the two generators will produce different sequences of values.