File encryption is the science of writing the contents of a file in a secret code. your encryption program should work like a filter, reading the contents of one file, modifying the data into a code, then writing the coded contents out to a second file. the second file will be a version of the first file, but written in a secret code. although there are complex encryption techniques, you are to come up with a simple one of your own. for example, you could read the first file one character at a time, and add 10 to the ascii code of each character before it is written to the second file. write a proram that encrypts a file using your "unique" key.