std::mersenne_twister_engine::seed

 

C++

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Technical Specifications

 

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linear_congruential_engine (C++11)

mersenne_twister_engine (C++11)

subtract_with_carry_engine (C++11)

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independent_bits_engine (C++11)

shuffle_order_engine (C++11)

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Seed Sequences

seed_seq (C++11)

C library

rand

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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>>

 

void seed( result_type value = default_seed );	(1)	(since C++11)
template< class Sseq > void seed( Sseq& seq );	(2)	(since C++11)

Reinitializes the internal state of the random-number engine using new seed value.

Parameters

value	-	seed value to use in the initialization of the internal state
seq	-	seed sequence to use in the initialization of the internal state

Exceptions

(none)

Example

Run this code

#include <iostream>
#include <random>
 
int main()
{
    std::mt19937 gen;
 
    // Seed the engine with an unsigned int
    gen.seed(1);
    std::cout << "after seed by 1: " << gen() << '\n';
 
    // Seed the engine with two unsigned ints
    std::seed_seq sseq{1, 2};
    gen.seed(sseq);
    std::cout << "after seed by {1,2}: " << gen() << '\n';
}

Possible output:

after seed by 1: 1791095845
after seed by {1,2}: 3127717181