This lecture was about two main concepts: files and strings. And btw, all of that in the context of pointers.
As you have seen an array of char is synonymous with a point to char that got the same size memory allocated to it. Find todays lecture
herelecture11. The homework is somewhat challenging because it requires you to juggle with arrays, string, and files, as well as loops. Start early, and try hard to solve this on your own. You can also use this demo file:poem as a test.