[Boost-users] lambda usage

Hi, It seems that the lambda manual lacks of a simple working example. I'm made up the following example. But it's not working. Could you please show me how to make it work? Thanks, Peng #include <boost/lambda/lambda.hpp> #include <boost/lambda/core.hpp> #include <iostream> using namespace boost::lambda; int main() { std::cout << (_1 + _2)(10, 10) << std::endl; }