problems using Random_Device

Hello,

My question is if Random_Device works on windows . If so, what am I doing wrong in this implementation?

Code:

#include <boost/random/mersenne_twister.hpp>
#include <boost/random/uniform_int_distribution.hpp>
#include <random>
#include<iostream>
#include<exception>

//This will create our ruler Dice
boost::random::mt19937 gen;
std::random_device rd;
int Roll_d( int n)
{
    gen.seed( rd());
    boost::random::uniform_int_distribution<> dist(1, n);
    return dist(gen);

}

I get a thrown std::runtime_error at me.

at first glance, I'd check to be sure that you can mix boost and std objects in the way you're trying to do it here.

Yeah, I realize that as well. I did changed it, but I still get the same error.

Code:

#include <random>
#include<iostream>




int main(void)
{
   std::random_device rd;
   std::mt19937 gen(rd());
   std::uniform_int_distribution<> dice(1, 6);
   std::cout<< dice(gen) ;
   std::cin.get();
   return 0;
}
}

so why not just use

Code:

rd=rand()%6+1;

?

@darkInuyasha: do not attempt to default-construct random_device on a windows machine. It will probably try to open dev/random. More importantly windows does not have a similar hardware source of randomness by default, so god knows what a working implementation uses. Default constructing a marsenne twister should work fine, as would seeding the prng from basically any other source. For your edification:

Code:

#include <random>
#include <iostream>
#include <stdexcept>

int main( void ) {
    try {
        std::random_device rd;
        std::mt19937 gen( rd() );
        std::uniform_int_distribution<> dice( 1, 6 );
        std::cout << dice( gen ) ;
        std::cin.get();
    } catch( std::exception &err ) {
        std::cerr << err.what() << std::endl;
    }
    return 0;
}

/*
my output:
random_device::random_device(const std::string&)
*/