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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/GAP/caesar-cipher.gap Normal file
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CaesarCipher := function(s, n)
local r, c, i, lower, upper;
lower := "abcdefghijklmnopqrstuvwxyz";
upper := "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
r := "";
for c in s do
i := Position(lower, c);
if i <> fail then
Add(r, lower[RemInt(i + n - 1, 26) + 1]);
else
i := Position(upper, c);
if i <> fail then
Add(r, upper[RemInt(i + n - 1, 26) + 1]);
else
Add(r, c);
fi;
fi;
od;
return r;
end;
CaesarCipher("IBM", 25);
# "HAL"
CaesarCipher("Vgg cphvi wzdibn vmz wjmi amzz viy zlpvg di ydbidot viy mdbcon.", 5);
# "All human beings are born free and equal in dignity and rights."