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Show Bid Request

Run-length coding
Bid Request Id: 38320
Bookmark in my 'To Do' list
Posted by: C++ coders (0 ratings)
Non-action Ratio: Very Good - 0.00%
Posted: Dec 4, 2002
4:09:55 PM EDT
Bidding Closes: Dec 11, 2002
4:14:30 PM EDT
Viewed (by coders): 102 times
Phase:
100% of work completed and accepted. Coder has been paid.
Max Accepted Bid: Bidding is closed
Project Type: Very Small Business Project: under $100 (USD)
Bidding Type: Open Auction
Categories: C++ / C
Enter chat room for this bid request
(0 active users at May 13, 2003 12:46:56 PM EDT)

Description:
Run length coding can be used as a text compression technique. Consider the following
string:
aaaaaaaaaaaaaakkkkkkkkkkkddddddddddlllllllllllll
In a run length coding scheme we could replace each character (if it was repeated more
than 4 times at any point) with the code \a n \ where n is the number of repeats. For
example, the above string would then reduce to a new string
\a14\\k11\\d10\\l13\
Giving us substantial compression in this case. Write two programs to carry out run
length encoding and decoding. The first program is to accept an ASCII file specified by
the user (e.g. input.txt) and produce a new file with the filename extension ".rlc" (e,g,
input.rlc) which is the run-length coded version of the users file, using the file format
specified above. The second program is to accept a run length coded file (in ASCII
format) specified by the user and produce a new file with the file extension txt (e.g.
input.txt) which is the decoded version of the file.
Use the file pi.txt from the website to test your program. It contains the first million
characters of Pi. Use your results to estimate very roughly how many times the same
number reoccurs consecutively five or more times in the decimal points of Pi.
Note that your programs will exhibit strange behaviour if the original text file you are
compressing contains the "\" character. How could you overcome this problem?


Deliverables:
I need help doing the program please and with brief discription how the program is working

Platform:
need to run
the pi file

Special Conditions / Other:
must hand in by 08/12/02

Additional Files:
This bid request includes IMPORTANT additional attached files. Please download and read fully before bidding.



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See all rejected bids (and all comments)
Name   Bid Amount 
 
Date   Coder Rating  
This bid was accepted by the buyer!
idleswell
(65 ratings)
in Saint John, New Brunswick
Canada
Bid id: 421,127
 
$20 (USD) Dec 7, 2002
10:50:40 PM EDT
 9.74
(Excellent)
   
Hello,

I would have thought this interesting problem would attract more bidding interest.

I know C or C++ string processing techniques to allow me to write an efficient run-length compression algorithm for you.

I can code productively enough with these libraries to complete this program within a day.

A IDLER
Chief Software Architect
Idleswell Software Creations

 
 
 
 
  See 13 private reply(ies)
to/from idleswell.
 




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