Hill Cipher in Java or C

You must write a program in either Java or C that encrypts the alphabetic letters in a file using the Hill cipher where the Hill matrix can be any size from 2 x 2 up to 9 x 9. The program will take two command line parameters containing the names of the file storing the encryption key and the file to be encrypted. The program must generate output to the console (terminal) screen. 1) The program must compile and run from the command prompt. 2) The program executable must be named "hillcipher" (all lower case, no spaces or file extensions.) 3) Input the required file names as command line parameters. The program must not prompt the user to enter the file names. The first parameter must be the name of the encryption key file. The second parameters must be the name of the file to be encrypted. The sample run command near the end of the attached document contains an example of how the parameters will be entered. 4) The program should open the two files, echo the input to the screen, make the necessary calculations, and then output the cipher text to the console screen as well. The attached RAR has a PDF that talks more in length about the requirements for this project and includes a sample key/input file/output file as well. It also has a program that's close to what I need in that it will take a file and encrypt it appropriately but it also prompts the user for input, fails to echo the input files, nor does it output the encrypted text to the command prompt. All of which I need. I do need this done by this Friday (February 21st) by noon at the very latest.