Few more
1. How to call a C++ function which is compiled with C++ compiler in C code?
2. When you deliver your C++ headers and C++ library of a class (what all can you change in the class so that application using your class does not need to recompile the code)
3. How do you initialize a static member of a class with return value of some function?
4. How can one application use same apis provided my different vendors at the same time ?