public/go/tests/prog/alphamirror_prog/main.go

package main

import (
	"fmt"
	"os"
)

func main() {
	if len(os.Args) == 2 {
		arg := []rune(os.Args[1])
		for i, ch := range arg {
			if ch >= 'a' && ch <= 'z' {
				arg[i] = 'z' - ch + 'a'
			} else if ch >= 'A' && ch <= 'Z' {
				arg[i] = 'Z' - ch + 'A'
			}
		}
		fmt.Print(string(arg))
	}

	fmt.Println()
}