What do you have so far? Or how are you thinking of attacking the problem?
-deech
On Wed, Mar 9, 2011 at 10:00 AM, Jessica Baker
3.1 Step 1 Create a Haskell script le called crypt.hs and enter the code for he Caesar cipher from Section 5.5 of the text book (Hutton). Make sure you understand how all the functions work.
3.2 Step 2 Transform your script le (from Step 1) into a Haskell program that reads text from the standard input, encrypts the text using the Caesar cipher, and writes the result to the standard output. Your program should take a command-line argument that speci es the shift factor to be used. So, for example: cat poem.txt | ./crypt 3 Eqvdqjxlqlqj wkh vnb Hrz khdylob lw glhv Iqwr wkh Whvw dzdb Pdvw wrxfk dqg vljkw dqg vrxqg Nr orqjhu wr eh irxqg Hrz krshohvv xqghujurxqg Fdoov wkh uhpruvhixo gdb
If the command-line argument is 0 (zero) then the program should crack the code and output the deciphered text. So, the following command pipeline should echo the original message: cat poem.txt | ./crypt 3 | ./crypt 0 Ensanguining the sky How heavily it dies Into the West away Past touch and sight and sound No longer to be found How hopeless underground Falls the remorseful day
_______________________________________________ Beginners mailing list Beginners@haskell.org http://www.haskell.org/mailman/listinfo/beginners