Calculate Average Score by Reading a File

Problem

Write a program that reads the content of a text file that contains scores of a class (0–100, one on each line) and calculates the average score.

Note: The calculated average score is rounded to one decimal point.

File format

The file contains integer values, each appearing on a separate line. Here's a sample file:

Expected Output

With the above example, the average calculated would be as follows: ...