[Boost-users] Random: How to get a different seed?

Hello, I am trying to make a simple program that can generate random integers in range, using boost::uniform_int. http://www.boost.org/doc/libs/1_45_0/doc/html/boost_random/tutorial.html#boo... This tutorial tells: "We use mt19937http://www.boost.org/doc/libs/1_45_0/doc/html/boost/mt19937.htmlwith the default seed as a source of randomness. The numbers produced will be the same every time the program is run. One common method to change this is to seed with the current time (std::time(0) defined in ctime)." I have trouble getting this common method compile and work. Here's a tiny program that works, with the same seed at every run (like what the tutorial does), I have commented out my desperate tries to make the seed change. #include "uniform_int.hpp" #include "boost/random/variate_generator.hpp" #include "boost/random/mersenne_twister.hpp" #include #include <iostream> using namespace std; using namespace boost; mt19937 gen; // time_t gen = time(0); int roll_die() { uniform_int<> dist(1, 6); variate_generator > die(gen, dist); //boost::variate_generator > die(gen, dist); return die(); } int main() { for (int i = 0; i < 5; i++) cout << roll_die() << endl; return 0; } So, I would be glad, if someone could fix this for me, to have a different seed (depending on system time) at each start. Thanks!