How to determine OpenCV version

Question

How to determine which version of OpenCV I have installed?

I am most interested in knowing a way of doing it programatically (and cross-platform), but I can

Answer 1

If you install from svn repository, you can see the exact revision version like that:

# in the opencv.svn directory
svn info

Answer 2

If you also want to get build information, you can use this code:

    printf("OpenCV: %s", cv::getBuildInformation().c_str());