i working on a c++ string library that have main 4 classes that deals with ASCII, UTF8, UTF16, UTF32 strings, every class has Print function that format an input string and print the result to stdout or stderr. my problem is i don't know what is the default character encoding for those streams.

for now my classes work in windows, later i'll add support for mac and linux so if you know anything about those stream encoding i'll appreciate it.

thank you.