std::mersenne_twister_engine - cppreference.com

##### cppreference.com

##### Search

Create account

##### Namespaces

- Page
- Discussion

##### Variants

##### Views

- View
- Edit
- History

##### Actions

# std::mersenne_twister_engine

From cppreference.com
< cpp‎ | numeric‎ | random

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<std::uint_fast32_t, 32, 624, 397, 31, 0x9908b0df, 11, 0xffffffff, 7, 0x9d2c5680, 15, 0xefc60000, 18, 1812433253> 32-bit Mersenne Twister by Matsumoto and Nishimura, 1998[edit]
`mt19937_64` | std::mersenne_twister_engine<uint_fast64_t, 64, 312, 156, 31, 0xb5026f5aa96619e9, 29, 0x5555555555555555, 17, 0x71d67fffeda60000, 37, 0xfff7eee000000000, 43, 6364136223846793005> 64-bit Mersenne Twister by Matsumoto and Nishimura, 2000[edit]

### [edit] 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.

### [edit] Member functions

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

### [edit] Non-member functions

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

### [edit] Member objects

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

Retrieved from "http://en.cppreference.com/mwiki/index.php?title=cpp/numeric/random/mersenne_twister_engine&oldid=63194"
Category:

- Todo without reason