std::experimental::reseed(3)

🦋 std::experimental::reseed(3) 🦋

okay bestie, this is the std::experimental::reseed(3) page from the C++ Standard Library manual, and it's giving “tiny reset button for the random vibes.” It's the function that reseeds the per-thread random engine — plus the std::uniform_int_distribution instances that randint is using. 💅✨

🌸 NAME 🌸

std::experimental::reseed - std::experimental::reseed

✨ Synopsis ✨

Defined in header <experimental/random> — and here's the synopsis block exactly as the page has it, with the overload markers (1) and (2) chilling in the margin:

Defined in header <experimental/random>
void reseed();                                             (1)
(library fundamentals
                                                                     TS v2)
void reseed( std::default_random_engine::result_type value (2)
(library fundamentals
);                                                             TS v2)

Both overloads are tagged library fundamentals TS v2. The actual job: it reseeds the per-thread random number engine and any std::uniform_int_distribution instances used by randint. (The whole squad gets a fresh start, no cap. 🫶)

1. Sets the per-thread engine to an unpredictable state.
2. Seeds the per-thread engine g as if by g.seed(value).

🎀 Parameters 🎀

• value — value of the new seed.

🔥 Remarks 🔥

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

🌈 Example 🌈

// Run this code

#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';
}

Possible output:

Random 2-digit decimal numbers: 41 60 56

👑 See also 👑

• randint — generates a random integer in the specified range (function template).

That's the whole page, bestie. Source/version + date: http://cppreference.com, 2024.06.10 — std::experimental::reseed(3) out, periodt. 💖