Answer Happy

Attention:
- integers are arbitrary,
positive and negative
- You need to look for all operations on stack
to solve the application: push, pop, check full/empty, checl to see
value on the top, …
- the Polish notation calculator operations: add,
substract, multiply, integer divide, square root, and power.
please 1. Use subroutines as much as
possible
2. Create user interface as clear and beautiful
as possible
3. Check range for every value input and output
appropriately
4. The program should be organized so well for
structure programming
5. The program needs to comment as mamy as
possible