Assistance needed

[smart25@t2.technion.ac.il]

Hello !
I'm trying to use Cygwin instead of installing a full-size Linux.
My task is learning system programming in Unix environment.
Unfortunately, I do not get "man" for some C/C++ functions,
such as "fork()", "cout", "getcwd()" etc. 
Other C functions (printf for example) are documented.
Where can I download the missing man pages ?
Thank you,
Andrey Gelman.