I haven't seen any clear way to calculate say an integral using something like c++ or c#.
Calculus is a study of continuous mathematics. C, C++, and every (?) other programming language work on principles of discrete mathematics, which is why you can read all about strange calculations with floating point variables. So, what you've seen is only natural.
My understanding of it is that most colleges/universities do not even consider offering discrete mathematic courses until at least Calculus 2 is completed, and in some places not for a year after even that.