#include <random>
#include <iostream>
 
int main()
{
    std::random_device rd;
    std::mt19937 gen(rd());
    const double min_v = 0.0, max_v = 100.0;
    std::uniform_real_distribution<> dis(min_v, max_v);
    for (int n = 0; n < 20; ) {
        std::cout << dis(gen) << ' ';
        if( ++n % 5 == 0 )  std::cout << std::endl;
    }
}