Playfair cipher: Difference between revisions
Content added Content deleted
m (→{{header|REXX}}: added a link to CHANGESTR.REX for use by older REXXes. -- ~~~~) |
m (→{{header|REXX}}: adjusted REXX program for the case of no arg before the ( not followed by a blank. -- ~~~~) |
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<br>Also added a a fair amount of code to massage the decrypted encryption to remove doubled '''X'''es so as to match the original text.
<lang rexx>/*REXX program implements a PLAYFAIR cipher (encryption & decryption).*/
parse arg key
if key =='' | key ==',' then do; key='Playfair example.'; oldK=key " ◄───using the default."; end
if omit=='' | omit==',' then omit='J' /*the "omitted" character. */
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