passing arguments to functions using pointers

This is an assignment that was given to me as follows;

Develop a program that inputs a set of test scores and displays the following:
• the set of scores
• average score
The function ‘calculate_total’ calculates the total score (so far) by using the score entered. Hint: The
function ‘calculate_total’ calculates the total using a pointer. In other words, a pointer argument (which is
a pointer to score) is passed to this function in order for the function to perform its task.

I need help on how to use functions and pointers in this problem....
Your assistance would be greatly appreciated...