1. 先关机 2. 同时按住 command+option+R+P 3. 按电源键开机，同时手指保持按住前几个按钮的姿势。 4. 等待电脑发出四下“deng”的声音后松开即可。每次发声间隔大概 ...

编译VC++程序的时候出现如下提示警告： warning C4819: The file contains a character that cannot be represented in the ...