future C++

[pacerier]

is the language of C++ still developing? or is it pretty much fixed and there are likely to be no changes in the future

[Bazzy]

The next version of C++ is nicknamed C++0x
http://www2.research.att.com/~bs/C++0xFAQ.html

[pacerier]

is it fully compatible with the existing source codes we have for our C++ projects? or is it an entirely new language

[firedraco]

If you read the FAQ, then you will find the answer to that question.