一个可以在Arm Linux环境下运行的对时程序，基于socket编写，可移植性强。 配置好了交叉编译工具链之后，直接make即可。 代码采用C++的面向对象开发，简单易用，模块清晰，便于裁剪和模块复用。(A time program that can run in Arm Linux environment is written based on socket, and has strong portability. After configuring the cross compila