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Showing content from https://cplusplus.com/seed_seq::generate below:

public member function

<random>

template <class RandomAccessIterator>  void generate (RandomAccessIterator first, RandomAccesIterator last);

Generate sequence

The values are generated using an algorithm that takes into account the internal sequence with which the object was initialized.

first, last

Random access iterators to the initial and final positions in a range. The range used is [first,last), which includes all the elements between first and last, including the element pointed by first but not the element pointed by last.
The function template type shall be a mutable random access iterator that points to elements of an integer type capable of accommodating 32-bit values.

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// seed_seq::generate
#include <iostream>
#include <random>
#include <array>

int main ()
{
  std::seed_seq seed = {102,406,7892};

  std::cout << "generating a sequence of 5 elements:" << std::endl;
  std::array<unsigned,5> sequence;
  seed.generate(sequence.begin(),sequence.end());
  for (unsigned x:sequence) {std::cout << x << std::endl;}

  return 0;
}

generating a sequence of 5 elements:
1744849824
2338808733
1540432678
2581311530
937904459

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