зеркало из https://github.com/softlandia/Go.git
42 строки
706 B
Go
42 строки
706 B
Go
package main
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import (
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"bytes"
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"flag"
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"fmt"
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"strings"
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)
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func main() {
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cipherKey := flag.Int("c", 0, "Cipher shift amount (-26 - 26)")
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input := flag.String("i", "", "Input")
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flag.Parse()
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if *cipherKey > 26 || *cipherKey < -26 {
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flag.PrintDefaults()
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} else {
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fmt.Println(caesarCipher(*input, *cipherKey))
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}
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}
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func caesarCipher(input string, key int) string {
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var outputBuffer bytes.Buffer
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for _, r := range strings.ToLower(input) {
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newByte := int(r)
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if newByte >= 'a' && newByte <= 'z' {
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newByte += key
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if newByte > 'z' {
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newByte -= 26
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} else if newByte < 'a' {
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newByte += 26
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}
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}
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outputBuffer.WriteString(string(newByte))
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}
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return outputBuffer.String()
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}
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