#!/bin/bash
# rot13.sh: ¾ÆÁÖ À¯Ä¡ÇÑ °íÀüÀûÀÎ rot13 ¾Ë°í¸®Áò

# »ç¿ë¹ý: ./rot13.sh filename
# or      ./rot13.sh <filename
# or      ./rot13.sh ¶ó°í ÇÑ ´ÙÀ½ Å°º¸µå¿¡¼­ ÀÔ·Â(stdin)

cat "$@" | tr 'a-zA-Z' 'n-za-mN-ZA-M'   # "a"´Â "n"ÀÌ µÇ°í, "b"´Â "o"°¡ µÇ´Âµî..
# 'cat "$@"' ¶ó°í Çϸé Ç¥ÁØÀÔ·ÂÀ̳ª ÆÄÀÏ¿¡¼­ ÀÔ·ÂÀ» ¹ÞÀ» ¼ö ÀÖ°Ô ÇØ ÁÝ´Ï´Ù.

exit 0