I am fairly familiar with Java and C# but new to c++. I feel it's very unclear where I should look for the standard c++ library documents. I found this one , provided by Microsoft, is pretty easy to look up and all the functions seems are well documented, but is it for the standard c++? Where do the experienced c++ programmers normally look for the standard c++ API documentations?

Another questions is that unlike Java and .Net, there are seems many implemetations of standard c++ library available and I want to know which library should I use If want to write portable code?

Thanks in advance!