Create a C program:

A caesar cipher is a simple cipher that shifts letters in a string. For example, shifting ab over by 1 would result in bc, and shifting xyz over by 2 would result in zab. The caesar program should take, in the command line an integer k, the amount to shift some text by, and a string f i l e, the name of a file containing text to encode using the cipher.

For example, suppose secret.txt contains defend the east wall of the castle, then running caesar with 3 should result in the following:

$ cat secret.txt

defend the east wall of the castle

$ ./caesar 3 secret.txt

ghihqg wkh hdvw zdoo ri wkh fdvwoh