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#include <iostream>
#include <math.h>
#include <random>
 
using namespace std;
 
int main()
{
    while(true)
    {
    mt19937 rng;
	rng.seed(std::random_device()());
	uniform_real_distribution<mt19937::result_type> unif(0, 1); // distribution in range [0,1]
	double num = unif(rng);
   cout << num << endl; 
    }
 
   return 0;
}

In file included from /usr/include/c++/5/random:49:0,
                 from prog.cpp:3:
/usr/include/c++/5/bits/random.h: In instantiation of 'class std::uniform_real_distribution<unsigned int>':
prog.cpp:13:54:   required from here
/usr/include/c++/5/bits/random.h:1868:7: error: static assertion failed: template argument not a floating point type
       static_assert(std::is_floating_point<_RealType>::value,
       ^
/usr/include/c++/5/bits/random.h: In instantiation of 'struct std::__detail::_Adaptor<std::mersenne_twister_engine<unsigned int, 32u, 624u, 397u, 31u, 2567483615u, 11u, 4294967295u, 7u, 2636928640u, 15u, 4022730752u, 18u, 1812433253u>, unsigned int>':
/usr/include/c++/5/bits/random.h:1981:6:   required from 'std::uniform_real_distribution<_RealType>::result_type std::uniform_real_distribution<_RealType>::operator()(_UniformRandomNumberGenerator&, const std::uniform_real_distribution<_RealType>::param_type&) [with _UniformRandomNumberGenerator = std::mersenne_twister_engine<unsigned int, 32u, 624u, 397u, 31u, 2567483615u, 11u, 4294967295u, 7u, 2636928640u, 15u, 4022730752u, 18u, 1812433253u>; _RealType = unsigned int; std::uniform_real_distribution<_RealType>::result_type = unsigned int]'
/usr/include/c++/5/bits/random.h:1973:51:   required from 'std::uniform_real_distribution<_RealType>::result_type std::uniform_real_distribution<_RealType>::operator()(_UniformRandomNumberGenerator&) [with _UniformRandomNumberGenerator = std::mersenne_twister_engine<unsigned int, 32u, 624u, 397u, 31u, 2567483615u, 11u, 4294967295u, 7u, 2636928640u, 15u, 4022730752u, 18u, 1812433253u>; _RealType = unsigned int; std::uniform_real_distribution<_RealType>::result_type = unsigned int]'
prog.cpp:14:23:   required from here
/usr/include/c++/5/bits/random.h:167:2: error: static assertion failed: template argument not a floating point type
  static_assert(std::is_floating_point<_DInputType>::value,
  ^

Standard output is empty