std::mersenne_twister_engine

 

C++

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Engines and engine adaptors

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mersenne_twister_engine (C++11)

subtract_with_carry_engine (C++11)

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C library

rand

srand

RAND_MAX

 

std::mersenne_twister_engine

Member functions

mersenne_twister_engine::mersenne_twister_engine

mersenne_twister_engine::seed

Generation

mersenne_twister_engine::operator()

mersenne_twister_engine::discard

Characteristics

mersenne_twister_engine::min

mersenne_twister_engine::max

Non-member functions

operator== operator!=

operator<< operator>>

 

Defined in header <random>
template<     class UIntType,     size_t w, size_t n, size_t m, size_t r,     UIntType a, size_t u, UIntType d, size_t s,     UIntType b, size_t t,     UIntType c, size_t l, UIntType f > class mersenne_twister_engine;		(since C++11)

mersenne_twister_engine is a random number engine based on Mersenne Twister algorithm. It produces high quality unsigned integer random numbers.

The following typedefs define the random number engine with two commonly used parameter sets:

Defined in header <random>
Type	Definition
mt19937	std::mersenne_twister_engine<uint_fast32_t, 32, 624, 397, 31,                              0x9908b0df, 11,                              0xffffffff, 7,                              0x9d2c5680, 15,                              0xefc60000, 18, 1812433253>
mt19937_64	std::mersenne_twister_engine<uint_fast64_t, 64, 312, 156, 31,                              0xb5026f5aa96619e9, 29,                              0x5555555555555555, 17,                              0x71d67fffeda60000, 37,                              0xfff7eee000000000, 43, 6364136223846793005>

Member types

Member type	Definition
result_type	The integral type generated by the engine. Results are undefined if this is not an unsigned integral type.

Member functions

Construction and Seeding
(constructor)	constructs the engine (public member function)
seed	sets the current state of the engine (public member function)
Generation
operator()	advances the engine's state and returns the generated value (public member function)
discard	advances the engine's state by a specified amount (public member function)
Characteristics
min [static]	gets the smallest possible value in the output range (public static member function)
max [static]	gets the largest possible value in the output range (public static member function)

Non-member functions

operator== operator!=	compares the internal states of two pseudo-random number engines (function)
operator<< operator>>	performs stream input and output on pseudo-random number engine (function)

Member objects

constexpr size_t word_size [static]	(public static member constant)
constexpr size_t state_size [static]	(public static member constant)
constexpr size_t shift_size [static]	(public static member constant)
constexpr size_t mask_bits [static]	(public static member constant)
constexpr UIntType xor_mask [static]	(public static member constant)
constexpr size_t tempering_u [static]	(public static member constant)
constexpr UIntType tempering_d [static]	(public static member constant)
constexpr size_t tempering_s [static]	(public static member constant)
constexpr UIntType tempering_b [static]	(public static member constant)
constexpr size_t tempering_t [static]	(public static member constant)
constexpr UIntType tempering_c [static]	(public static member constant)
constexpr size_t tempering_l [static]	(public static member constant)
constexpr UIntType initialization_multiplier [static]	(public static member constant)
constexpr UIntType default_seed [static]	(public static member constant)