How to return multiple values from a funtion back to main?

Question

We were ask to make a function that has initialized array of grades and the funtion has to return grades above 75 in c

Answer 1

You have to pass the function a pointer to the result array, and modify it in the function via those pointers. That's the way to do it in C. I suggest continue with the sololearn course because you will find the explanation on the way.
https://www.sololearn.com/learn/C/2934/

Answer 2

You can also create a struct. That can be returned as one object.

Answer 3

Store above 75 grades in another array, and Return that array...