Public Types | |
| typedef _UIntType | result_type |
Public Member Functions | |
| linear_congruential_engine () | |
| template<typename _Sseq , typename = _If_seed_seq<_Sseq>> | |
| linear_congruential_engine (_Sseq &__q) | |
| linear_congruential_engine (result_type __s) | |
| void | discard (unsigned long long __z) |
| result_type | operator() () |
| template<typename _Sseq > | |
| _If_seed_seq< _Sseq > | seed (_Sseq &__q) |
| template<typename _Sseq > | |
| auto | seed (_Sseq &__q) -> _If_seed_seq< _Sseq > |
| void | seed (result_type __s=default_seed) |
Static Public Member Functions | |
| static constexpr result_type | max () |
| static constexpr result_type | min () |
Static Public Attributes | |
| static constexpr result_type | default_seed |
| static constexpr result_type | increment |
| static constexpr result_type | modulus |
| static constexpr result_type | multiplier |
Friends | |
| template<typename _UIntType1 , _UIntType1 __a1, _UIntType1 __c1, _UIntType1 __m1, typename _CharT , typename _Traits > | |
| std::basic_ostream< _CharT, _Traits > & | operator<< (std::basic_ostream< _CharT, _Traits > &__os, const std::linear_congruential_engine< _UIntType1, __a1, __c1, __m1 > &__lcr) |
| bool | operator== (const linear_congruential_engine &__lhs, const linear_congruential_engine &__rhs) |
| template<typename _UIntType1 , _UIntType1 __a1, _UIntType1 __c1, _UIntType1 __m1, typename _CharT , typename _Traits > | |
| std::basic_istream< _CharT, _Traits > & | operator>> (std::basic_istream< _CharT, _Traits > &__is, std::linear_congruential_engine< _UIntType1, __a1, __c1, __m1 > &__lcr) |
Detailed Description
template<typename _UIntType, _UIntType __a, _UIntType __c, _UIntType __m>
class std::linear_congruential_engine< _UIntType, __a, __c, __m >
A model of a linear congruential random number generator.
A random number generator that produces pseudorandom numbers via linear function:
![\[ x_{i+1}\leftarrow(ax_{i} + c) \bmod m \]](https://gcc.gnu.org/onlinedocs/gcc-10.4.0/libstdc++/api/form_0.png)
The template parameter _UIntType must be an unsigned integral type large enough to store values up to (__m-1). If the template parameter __m is 0, the modulus __m used is std::numeric_limits<_UIntType>::max() plus 1. Otherwise, the template parameters __a and __c must be less than __m.
The size of the state is 
.
Member Typedef Documentation
◆ result_type
| typedef _UIntType std::linear_congruential_engine< _UIntType, __a, __c, __m >::result_type |
Constructor & Destructor Documentation
◆ linear_congruential_engine() [1/3]
|
inline |
◆ linear_congruential_engine() [2/3]
|
inlineexplicit |
Constructs a linear_congruential_engine random number generator engine with seed __s. The default seed value is 1.
- Parameters
-
__s The initial seed value.
Definition at line 293 of file random.h.
References std::linear_congruential_engine< _UIntType, __a, __c, __m >::seed().
◆ linear_congruential_engine() [3/3]
|
inlineexplicit |
Constructs a linear_congruential_engine random number generator engine seeded from the seed sequence __q.
- Parameters
-
__q the seed sequence.
Definition at line 304 of file random.h.
References std::linear_congruential_engine< _UIntType, __a, __c, __m >::seed().
Member Function Documentation
◆ discard()
|
inline |
◆ max()
|
inlinestaticconstexpr |
◆ min()
|
inlinestaticconstexpr |
◆ operator()()
|
inline |
◆ seed() [1/3]
| _If_seed_seq<_Sseq> std::linear_congruential_engine< _UIntType, __a, __c, __m >::seed | ( | _Sseq & | __q | ) |
Reseeds the linear_congruential_engine random number generator engine sequence using values from the seed sequence __q.
- Parameters
-
__q the seed sequence.
◆ seed() [2/3]
| auto std::linear_congruential_engine< _UIntType, __a, __c, __m >::seed | ( | _Sseq & | __q | ) | -> _If_seed_seq<_Sseq> |
Seeds the LCR engine with a value generated by __q.
Definition at line 132 of file bits/random.tcc.
References std::__lg().
◆ seed() [3/3]
| void std::linear_congruential_engine< _UIntType, __a, __c, __m >::seed | ( | result_type | __s = default_seed | ) |
Reseeds the linear_congruential_engine random number generator engine sequence to the seed __s.
- Parameters
-
__s The new seed.
Seeds the LCR with integral value __s, adjusted so that the ring identity is never a member of the convergence set.
Definition at line 116 of file bits/random.tcc.
Referenced by std::linear_congruential_engine< _UIntType, __a, __c, __m >::linear_congruential_engine().
Friends And Related Function Documentation
◆ operator<<
|
friend |
Writes the textual representation of the state x(i) of x to __os.
- Parameters
-
__os The output stream. __lcr A % linear_congruential_engine random number generator.
- Returns
- __os.
◆ operator==
|
friend |
Compares two linear congruential random number generator objects of the same type for equality.
- Parameters
-
__lhs A linear congruential random number generator object. __rhs Another linear congruential random number generator object.
- Returns
- true if the infinite sequences of generated values would be equal, false otherwise.
◆ operator>>
|
friend |
Sets the state of the engine by reading its textual representation from __is.
The textual representation must have been previously written using an output stream whose imbued locale and whose type's template specialization arguments _CharT and _Traits were the same as those of __is.
- Parameters
-
__is The input stream. __lcr A % linear_congruential_engine random number generator.
- Returns
- __is.
Member Data Documentation
◆ increment
|
staticconstexpr |
◆ modulus
|
staticconstexpr |
◆ multiplier
|
staticconstexpr |
The documentation for this class was generated from the following files:
