C Program

The program takes a single command line argument, the name of an input file.

Your program should confirm the input file exists (exit with an appropriate error message if it does not).

If the file exists, then count the number of upper-case and lower-case letters in the file.

Print your counts to standard output.

contents of myData

The Quick Brown FoX Jumps Over the LAZY Old doG. Roll TIDE 1831!

./a.out myData

Uppercase = 18, lowercas