How to determine the Boost version on a system?

Include #include <boost/version.hpp>

std::cout << "Using Boost "     
          << BOOST_VERSION / 100000     << "."  // major version
          << BOOST_VERSION / 100 % 1000 << "."  // minor version
          << BOOST_VERSION % 100                // patch level
          << std::endl;

Possible output: Using Boost 1.75.0

Tested with Boost 1.51.0 to 1.63, 1.71.0 and 1.76.0 to 1.80.0

Boost Informational Macros. You need: BOOST_VERSION