std::independent_bits_engine<Engine,W,UIntType>::independent_bits_engine
From cppreference.com
< cpp | numeric | random | independent bits engine
independent_bits_engine(); |
(1) | (since C++11) |
explicit independent_bits_engine( result_type s ); |
(2) | (since C++11) |
template< class Sseq > explicit independent_bits_engine( Sseq& seq ); |
(3) | (since C++11) |
explicit independent_bits_engine( const Engine& e ); |
(4) | (since C++11) |
explicit independent_bits_engine( Engine&& e ); |
(5) | (since C++11) |
Constructs new pseudo-random engine adaptor.
1) Default constructor. The underlying engine is also default-constructed.
2) Constructs the underlying engine with
s
.3) Constructs the underlying engine with seed sequence
seq
.
This constructor only participate in overload resolution if Sseq
qualifies as a SeedSequence. In particular, this constructor does not participate in overload resolution if Sseq
is implicitly convertible to result_type
.4) Constructs the underlying engine with a copy of
e
.5) Move-constructs the underlying engine with
e
. e
holds unspecified, but valid state afterwards.Parameters
s | - | integer value to construct the underlying engine with |
seq | - | seed sequence to construct the underlying engine with |
e | - | pseudo-random number engine to initialize with |
Example
Run this code
#include <iostream> #include <random> int main() { auto print = [](auto rem, auto engine, int count) { std::cout << rem << ": "; for (int i{}; i != count; ++i) std::cout << static_cast<unsigned>(engine()) << ' '; std::cout << '\n'; }; std::independent_bits_engine<std::mt19937, /*bits*/ 1, unsigned short> e1; // default-constructed print("e1", e1, 8); std::independent_bits_engine<std::mt19937, /*bits*/ 1, unsigned int> e2(1); // constructed with 1 print("e2", e2, 8); std::random_device rd; std::independent_bits_engine<std::mt19937, /*bits*/ 3, unsigned long> e3(rd()); // seeded with rd() print("e3", e3, 8); std::seed_seq s{3,1,4,1,5}; std::independent_bits_engine<std::mt19937, /*bits*/ 3, unsigned long long> e4(s); // seeded with seed-sequence s print("e4", e4, 8); }
Possible output:
e1: 0 0 0 1 0 1 1 1 e2: 1 1 0 0 1 1 1 1 e3: 3 1 5 4 3 2 3 4 e4: 0 2 4 4 4 3 3 6