24 lines
404 B
C++
24 lines
404 B
C++
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#include <string>
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namespace MyLibrary {
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// Rotate each letter by 13 characters.
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std::string rot13(const std::string& in) {
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std::string out;
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for ( auto c : in ) {
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char b = islower(c) ? 'a' : 'A';
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auto d = c - b + 13;
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if ( d >= 13 && d <= 38 )
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c = static_cast<char>(d % 26 + b);
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out.push_back(c);
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}
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return out;
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}
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} // namespace MyLibrary
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