discrete distribution, C++ (vc++)

Language: Layout:

//Microsoft (R) C/C++ Optimizing Compiler Version 19.00.23506 for x64

#include <iostream>
#include <random>
#include <iterator>

int main()
{
    // https://en.cppreference.com/w/cpp/numeric/random
    std::mt19937 rng( std::random_device{}() ) ;

const int numbers[] {  2, 3, 4, 5, 8 } ;
    const int weights[ std::size(numbers) ] { 30, 30, 30, 5, 5 } ;
    // https://en.cppreference.com/w/cpp/numeric/random/discrete_distribution
    std::discrete_distribution<int> distrib( std::begin(weights), std::end(weights) ) ;

const int N = 10'000'000 ;
    int counts[ std::size(numbers) ] {} ;
    for( int i = 0 ; i < N ; ++i )
    {
        const int pos_selected = distrib(rng) ;
        ++counts[pos_selected] ;

/* if( i < 400 )
        {
            std::cout << numbers[pos_selected] << ' ' ;
            if( i%25 == 24 ) std::cout << '\n' ;
        }*/
    }

for( unsigned int i = 0 ; i < std::size(numbers) ; ++i )
        std::cout << numbers[i] << " was picked " << counts[i] << " times.\n" ;
}

Show compiler warnings [ + ] Compiler args [ + ] Show input
Compilation time: 2 sec, absolute running time: 2,08 sec, absolute service time: 4,09 sec