Compressor takes is a c program that takes a text file as a commandline argument and compresses it.
Decompressor is a c program (not written by me) that decompresses the compressed file Compressor created.
To compress a file type ./compress textfile.txt | ./decompress
compare original and the new decompressed: ./compress textfile.txt | ./decompress | diff - textfile.txt
also,
./compress textfile.txt > textfile.txt.zipped creates a file that is takes up less memory than the original.