First of all, no programming help forum is going to do or debug your assignment for you. Therefore, posting your detailed list of requirements is irrelevant, because programming help forums can only help you with specific programming questions, specific programming errors, or specific programming problems with your code.
Secondly, "The program crashes.." is not a specific statement of a question, error, or problem you need help with. If you can pin down where the problem is occurring in the code and ask a specific question like "after line wwww I am getting xxxx for a value in yyyy instead of zzzz" then someone can probably help you solve the problem with that specific section of code, but just posting all your code and stating that it crashes is not going to get you a helpful response, that is not how programming help forums work.