file compression

File compression is useful when transmitting very large files.Ascii text files encode each chracter by an 8 bit fixed lenght code.Such files can often be significantly compressed if instead of this fixed lenght code one uses a variable lenght code where the more frequently occuring characters have short codes and the less frequently occuring characters have longer codes.For example ,a large data file might have mostly digit,space and new-line characters in it.If short(less than 8 bit) codes are used for these then the file would be significantly compressed.A Lisp file might have many left and right parentheses in it.Using short codes for these would compress the file.I used Huffman codes to compress the file .I worked real hard on it and it is long program Please declare me the winner of this new year.