一个系统安全工具，可管理系统进程、服务、启动项、等-a system security tools, process management systems, services, Startup items, etc.

如上程序是为了完成输入字符串的加密，将全部的字母都换成它的后面第三个字符，在输入时是一次性输入一串字符的-As the program is to complete the input string encryption, all the letters are replaced behind it the third character in the input string of characters is entered once