sinx逼近 数学中曾经介绍过，三角函数可以展开为无穷泰勒级数。而泰勒级数可以通过循环累加实现，而循环累加操作恰好是C语言最容易实现的操作，因此，使用C语言实现三角函数的逼近则变得非常简单而容易实现。-sinx approximation has introduced mathematics, trigonometric functions can be expanded into an infinite Taylor series. Taylor series can be achieve

UDP and TCP 可以使用这个文件来运行任何tcp和udp，然后做成后端和前端(The server communicating with the client is called AWS (Amazon Web Server). The three backend servers are named Back-Server A, Back-Server B and Back-Server C. Back-Server A can compute x2 , Back-Server B