std::experimental::reseed - cppreference.com

void reseed();

void reseed( std::default_random_engine::result_type value );

Reseeds the per-thread random number engine and any std::uniform_int_distribution instances used by randint.

1) Sets the per-thread engine to an unpredictable state.

2) Seeds the per-thread engine g as if by g.seed(value).

Parameters

Subsequent calls to randint do not depend on values produced by the per-thread engine prior to calling reseed.

Example

#include <experimental/random>
#include <iostream>

int main()
{
    std::experimental::reseed();

    std::cout << "Random 2-digit decimal numbers: ";

    for (auto i = 0; i != 3; ++i)
        std::cout << std::experimental::randint(10, 99) << ' ';
    std::cout << '\n';
}

Random 2-digit decimal numbers: 41 60 56

See also