create a program that:
-opens the file provided for input (this file is titled 'Lab_HW10_Input.txt' and simply has 1-10, with each number on a new line for 10 lines total)
-calls a function to determine how many lines are in the file
-creates an array of the proper size
-calls a function to read the file and populate the array
-calls a function to write out the contents of the array in reverse order
*output file should be named 'reverse_output.txt'