1. (10) Write a program that takes a filename as a command-line input and 
prints to the console how many lines are in that file.  Remember that the
character '\n' signifies the end of a line.

2. (10) Write a program that takes two filenames as command-line inputs.  It
should copy the contents of the first file into the second file, except if a
character is lowercase (c>='a' && c<='z') then uppercase it (c = c - 'a' + 'A')
 in the written-to file.

2. (20) Write a program that takes a filename as a command-line input and reads
however many integers are in that file.  You should print out the following
statistics on the integers: mean and median (this will require you to sort
your integers).