Header files of C?? ?

Some common header files in C++ include:

1. iostream - for input and output operations
2. string - for string manipulation
3. vector - for dynamic arrays
4. algorithm - for various algorithms like sorting and searching
5. map - for key-value pairs
6. set - for storing unique elements
7. queue - for implementing queues
8. stack - for implementing stacks
9. utility - for various utility functions
10. cstdlib - for standard library functions

These are just a few examples, and there are many more header files available in C++ for different purposes.