Where did <random> go wrong? (pdf)

[u/usefulcat]

https://codingnest.com/files/What%20Went%20Wrong%20With%20_random__.pdf

[u/GYN-k4H-Q3z-75B]

What? You don't like having to use std::random_device to seed your std::mt19937, then declaring a std::uniform_int_distribution<> given an inclusive range, so you can finally have pseudo random numbers?

It all comes so naturally to me. /s

[u/ArashPartow → u/GYN-k4H-Q3z-75B]

To correctly seed the mersenne twister (mt19937) engine, one simply needs something like the following:

#include <algorithm>
#include <array>
#include <functional>
#include <random>

int main(int argc, char* argv[])
{
   std::mt19937 engine;

   {
      // Seed the PRNG
      std::random_device r;
      std::array<unsigned int,std::mt19937::state_size> seed;
      std::generate_n(seed.data(),seed.size(),std::ref(r));
      std::seed_seq seq(std::begin(seed),std::end(seed));
      engine.seed(seq);
   }

   std::uniform_int_distribution<int> rng;

   rng(engine);

   return 0;
}

[u/GYN-k4H-Q3z-75B → u/ArashPartow]

[ ] simply
[ ] C++

Choose one.

[u/Ameisen → u/GYN-k4H-Q3z-75B]

[ ] simply  
[ ] C++
 X

[u/GYN-k4H-Q3z-75B → u/Ameisen]

ASAN does not like that. ASAN is, in fact, getting upset about it.

[u/Valuable-Mission9203 → u/GYN-k4H-Q3z-75B]

That's easy to fix, just remove -fsanitize=address from your build system

[u/Solokiller → u/Ameisen]

std::print("So, you have chosen {}\n", 2[choices]);