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std::mersenne_twister_engine::seed

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< cpp‎ | numeric‎ | random‎ | mersenne twister engine
Revision as of 05:55, 4 March 2014 by Wanttoknow (Talk | contribs)

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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.

Contents

[edit] 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

[edit] Exceptions

(none)

[edit] Complexity

[edit] Example

#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