09/11/11 22:28:03
>>720
str = "Hwduytlwfumd nx ymj uwfhynhj fsi xyzid tk mninsl nsktwrfynts. Ns rtijws
ynrjx, hwduytlwfumd nx htsxnijwji f gwfshm tk gtym rfymjrfynhx fsi htruzyjw
xhnjshj, fsi nx fkknqnfyji hqtxjqd bnym nsktwrfynts ymjtwd, htruzyjw xjhzwnyd,
fsi jslnsjjwnsl. Hwduytlwfumd nx zxji ns fuuqnhfyntsx uwjxjsy ns
yjhmstqtlnhfqqd fiafshji xthnjynjx; jcfruqjx nshqzij ymj xjhzwnyd tk FYR hfwix,
htruzyjw ufxxbtwix, fsijqjhywtsnh htrrjwhj, bmnhm fqq ijujsi ts
hwduytlwfumd."
26.times do |i|
puts "i = #{i}"
tmp = ""
str.each_byte do |c|
ss = "" << c
if ss.downcase =~ /[abcdefghijklmnopqrstuvwxyz]/
# $(B%"%k%U%!%Y%C%H$J$i(B
if ss == ss.downcase
# $(B>.J8;z(B
tmp << ((c - 97 + i) % 26) + 97
else
# $(BBgJ8;z(B
tmp << ((c - 65 + i) % 26) + 65
end
else
tmp << c
end
end
puts tmp
end