c++ abstract

1. system function

2. the use of namespace to distinguish

3. the order of linking; linker links object module (corresponding to file) and the order may be fixed

4. extern (declaration rather than definition)

5. oct hex used for output with different numeric formats

6. the C++ Standard does not “include” the STL (HP and then SGI)

7. The boundary between compilers and interpreters can with Python, which has many of the features and power of a compiled language but the quick of an interpreted language.

8. volatile versus const; volatile means “You never know when this will change,” and prevents the compiler from performing any optimizations based on the stability of that variable.