Random Number Generators(3)

NAME
Random Number Generators -

  Classes
class std::discard_block_engine< _RandomNumberEngine, __p, __r >
class std::independent_bits_engine< _RandomNumberEngine, __w, _UIntType >
class std::linear_congruential_engine< _UIntType, __a, __c, __m >
A model of a linear congruential random number generator.
class std::random_device
class std::shuffle_order_engine< _RandomNumberEngine, __k >
Produces random numbers by combining random numbers from some base engine to produce random numbers with a specifies number of bits __w.

  Typedefs
typedef minstd_rand0 std::default_random_engine
typedef shuffle_order_engine< minstd_rand0, 256 > std::knuth_b
typedef linear_congruential_engine< uint_fast32_t, 48271UL, 0UL, 2147483647UL > std::minstd_rand
typedef linear_congruential_engine< uint_fast32_t, 16807UL, 0UL, 2147483647UL > std::minstd_rand0
typedef mersenne_twister_engine< uint_fast32_t, 32, 624, 397, 31, 0x9908b0dfUL, 11, 0xffffffffUL, 7, 0x9d2c5680UL, 15, 0xefc60000UL, 18, 1812433253UL > std::mt19937
typedef mersenne_twister_engine< uint_fast64_t, 64, 312, 156, 31, 0xb5026f5aa96619e9ULL, 29, 0x5555555555555555ULL, 17, 0x71d67fffeda60000ULL, 37, 0xfff7eee000000000ULL, 43, 6364136223846793005ULL > std::mt19937_64
typedef discard_block_engine< ranlux24_base, 223, 23 > std::ranlux24
typedef subtract_with_carry_engine< uint_fast32_t, 24, 10, 24 > std::ranlux24_base
typedef discard_block_engine< ranlux48_base, 389, 11 > std::ranlux48
typedef subtract_with_carry_engine< uint_fast64_t, 48, 5, 12 > std::ranlux48_base

  Functions
template<typename _RandomNumberEngine , size_t __w, typename _UIntType , typename _CharT , typename _Traits > std::basic_ostream< _CharT, _Traits > & std::operator<< (std::basic_ostream< _CharT, _Traits > &__os, const std::independent_bits_engine< _RandomNumberEngine, __w, _UIntType > &__x)

Detailed Description

These classes define objects which provide random or pseudorandom numbers, either from a discrete or a continuous interval. The random number generator supplied as a part of this library are all uniform random number generators which provide a sequence of random number uniformly distributed over their range.

A number generator is a function object with an operator() that takes zero arguments and returns a number.

A compliant random number generator must satisfy the following requirements. To be documented. Random Number Generator Requirements

Typedef Documentation

  typedef minstd_rand0 std::default_random_engine

Definition at line 1432 of file bits/random.h.

  typedef shuffle_order_engine<minstd_rand0, 256> std::knuth_b

Definition at line 1427 of file bits/random.h.

  typedef linear_congruential_engine<uint_fast32_t, 48271UL, 0UL, 2147483647UL> std::minstd_rand

An alternative LCR (Lehmer Generator function) .

Definition at line 1381 of file bits/random.h.

  typedef linear_congruential_engine<uint_fast32_t, 16807UL, 0UL, 2147483647UL> std::minstd_rand0

The classic Minimum Standard rand0 of Lewis, Goodman, and Miller.

Definition at line 1375 of file bits/random.h.

  typedef mersenne_twister_engine< uint_fast32_t, 32, 624, 397, 31, 0x9908b0dfUL, 11, 0xffffffffUL, 7, 0x9d2c5680UL, 15, 0xefc60000UL, 18, 1812433253UL> std::mt19937

The classic Mersenne Twister.

Reference: M. Matsumoto and T. Nishimura, 'Mersenne Twister: A 623-Dimensionally Equidistributed Uniform Pseudo-Random Number Generator', ACM Transactions on Modeling and Computer Simulation, Vol. 8, No. 1, January 1998, pp 3-30.

Definition at line 1397 of file bits/random.h.

  typedef mersenne_twister_engine< uint_fast64_t, 64, 312, 156, 31, 0xb5026f5aa96619e9ULL, 29, 0x5555555555555555ULL, 17, 0x71d67fffeda60000ULL, 37, 0xfff7eee000000000ULL, 43, 6364136223846793005ULL> std::mt19937_64

An alternative Mersenne Twister.

Definition at line 1409 of file bits/random.h.

  typedef subtract_with_carry_engine<uint_fast32_t, 24, 10, 24> std::ranlux24_base

Definition at line 1415 of file bits/random.h.

Function Documentation

  template<typename _RandomNumberEngine , size_t __w, typename _UIntType , typename _CharT , typename _Traits > std::basic_ostream<_CharT, _Traits>& std::operator<< (std::basic_ostream< _CharT, _Traits > & __os, const std::independent_bits_engine< _RandomNumberEngine, __w, _UIntType > & __x) [inline]

Inserts the current state of a independent_bits_engine random number generator engine __x into the output stream __os.

Parameters:
    __os An output stream.
    __x A independent_bits_engine random number generator engine.

Returns:
    The output stream with the state of __x inserted or in an error state.

Definition at line 1153 of file bits/random.h.

Author

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