std::mersenne_twister_engine
| Defined in header  <random> | ||
| template<     class UIntType,  | (since C++11) | |
mersenne_twister_engine is a random number engine based on Mersenne Twister algorithm. It produces high quality unsigned integer random numbers of type UIntType on the interval [0, 2w
-1].
The following type aliases 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,  | 
| mt19937_64 | std::mersenne_twister_engine<std::uint_fast64_t, 64, 312, 156, 31, | 
| Contents | 
[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 | |
| constructs the engine (public member function) | |
| sets the current state of the engine (public member function) | |
| Generation | |
| advances the engine's state and returns the generated value (public member function) | |
| advances the engine's state by a specified amount (public member function) | |
| Characteristics | |
| [static] | gets the smallest possible value in the output range (public static member function) | 
| [static] | gets the largest possible value in the output range (public static member function) | 
[edit] Non-member functions
| compares the internal states of two pseudo-random number engines (function template) | |
| performs stream input and output on pseudo-random number engine (function template) | 
[edit] Member objects
| constexpr size_t word_size [static] | the template parameter w, determines the range of values generated by the engine.(public static member constant) | 
| constexpr size_t state_size [static] | the template parameter n. The engine state isnvalues ofUIntType(public static member constant) | 
| constexpr size_t shift_size [static] | the template parameter m(public static member constant) | 
| constexpr size_t mask_bits [static] | the template parameter r, also known as the twist value.(public static member constant) | 
| constexpr UIntType xor_mask [static] | the template parameter a, the conditional xor-mask.(public static member constant) | 
| constexpr size_t tempering_u [static] | the template parameter u, first component of the bit-scrambling (tempering) matrix(public static member constant) | 
| constexpr UIntType tempering_d [static] | the template parameter d, second component of the bit-scrambling (tempering) matrix(public static member constant) | 
| constexpr size_t tempering_s [static] | the template parameter s, third component of the bit-scrambling (tempering) matrix(public static member constant) | 
| constexpr UIntType tempering_b [static] | the template parameter b, fourth component of the bit-scrambling (tempering) matrix(public static member constant) | 
| constexpr size_t tempering_t [static] | the template parameter t, fifth component of the bit-scrambling (tempering) matrix(public static member constant) | 
| constexpr UIntType tempering_c [static] | the template parameter c, sixth component of the bit-scrambling (tempering) matrix(public static member constant) | 
| constexpr size_t tempering_l [static] | the template parameter l, seventh component of the bit-scrambling (tempering) matrix(public static member constant) | 
| constexpr UIntType initialization_multiplier [static] | the template parameter f(public static member constant) | 
| constexpr UIntType default_seed [static] | the constant value 5489u (public static member constant) | 
[edit] Notes
The 10000th consecutive invocation of a default-contructed std::mt19937 is required to produce the value 4123659995. 
The 10000th consecutive invocation of a default-contructed std::mt19937_64 is required to produce the value 9981545732273789042


