I am new to C++ and extremely surprised by the lack of accessible, common probability manipulation tools (i.e. the lack of things in Boost and the standard library). I\'ve d
You should do less C++ bashing, and more question asking - we try to be helpful and respectful on SO. Questions like yours are often tagged as inflammatory.
Boost::math
seems to provide exactly what you're looking for: https://www.quantnet.com/cplusplus-statistical-distributions-boost/ - I'm not 100% sure about how well it handles multi-variate distributions though (nor am I an expert on statistics).
Get it here: http://www.boost.org/doc/libs/1_49_0/libs/math/doc/html/index.html