aparler/RosettaCodeData
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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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Task/Caesar-cipher/Icon/caesar-cipher.icon Normal file
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procedure main()
ctext := caesar(ptext := map("The quick brown fox jumped over the lazy dog"))
dtext := caesar(ctext,,"decrypt")
write("Plain text = ",image(ptext))
write("Encphered text = ",image(ctext))
write("Decphered text = ",image(dtext))
end
procedure caesar(text,k,mode) #: mono-alphabetic shift cipher
/k := 3
k := (((k % *&lcase) + *&lcase) % *&lcase) + 1
case mode of {
&null|"e"|"encrypt": return map(text,&lcase,(&lcase||&lcase)[k+:*&lcase])
"d"|"decrypt" : return map(text,(&lcase||&lcase)[k+:*&lcase],&lcase)
}
end