Ruby读取键盘输入 windows

[代码] ruby代码

01 require 'Win32API'
02
03 def getch
04   @getch ||= Win32API.new('crtdll', '_getch', [], 'L')
05   @getch.call
06 end
07
08 while (c = getch) != ?\e
09   puts "You typed #{c.chr.inspect}"
10 end