Ruby版本的“汉诺塔(Hanoi)”程序

def hanoi(n, from, to, temp)
  if(n<0)
    puts "n should be a positive integer."
  elsif(n==1)
    move(n, from, to)
  else
    hanoi(n-1, from, temp, to)
    move(n, from, to)
    hanoi(n-1, temp, to, from)
  end
end

def move(n, from, to)
  puts "Move No.#{n} disk from #{from} to #{to}."
end

hanoi(5, "Start", "Finish", "Temp")