Mini Lab: Structs and Dynamic Memory

This is a mini lab intended to be completed in class. You have two goals:

• Use what you’ve learned about structs to update one of your past labs (you can choose which!).
  1. Use a struct to represent the program’s options
  2. Create an instance of the struct that begins with the program’s default settings
  3. Adjust the struct as you process command line options
  4. Practice passing the struct to a function. If you already implemented your program logic outside of main, e.g., maybe in the cat lab you have a cat function that handles most of the program logic, pass the struct to the function so that it has access to the settings.
     • If you didn’t design your past lab that way, then now is a great time to refactor it so you can implement this!
• Create a copy of the lab you just added structs to and refactor it so that all variables are dynamically allocated on the heap with malloc instead of on the stack.
  • Once you’re finished and your program works as intended, run it under valgrind to ensure there are no memory leaks.
    • valgrind --track-fds=yes --track-origins=yes --leak-check=full program_name

Grading

Demonstrate both goals above for full credit. If you only complete the first goal, then you will earn 50% credit.