22 lines
557 B
D
22 lines
557 B
D
import std.stdio, std.traits;
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pure S rot(S)(in S s, in int key) if (isSomeString!S) {
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auto res = s.dup;
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foreach (i, ref c; res) {
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if ('a' <= c && c <= 'z')
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c = ((c - 'a' + key) % 26 + 'a');
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else if ('A' <= c && c <= 'Z')
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c = ((c - 'A' + key) % 26 + 'A');
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}
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return cast(S) res;
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}
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void main() {
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int key = 3;
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auto txt = "The five boxing wizards jump quickly";
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writeln("Original: ", txt);
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writeln("Encrypted: ", txt.rot(key));
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writeln("Decrypted: ", txt.rot(key).rot(26 - key));
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}
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