[Boost-users] Simple example program builds but hangs when I run it. (Ubuntu).

Hello, I run Ubuntu 11.04. I downloaded Boost 1.48.0, then I followed the instructions from Getting Started on Unix variants to build the libraries into /usr/local/include and /usr/local/lib. Now, I build the Simple example program without any errors, however when I run the program it just hangs indefinitely on std::for_each() line. Could someone help me with this please? $: g++ -g -lboost_filesystem main.cpp #include #include <iostream> #include <iterator> #include <algorithm> int main() { using namespace boost::lambda; typedef std::istream_iterator<int> in; std::for_each(in(std::cin), in(), std::cout << (_1 * 3) << " " ); int stop = 1; }