通过用C语言来实现BT功能，来验证C语言的强大，并更 了解P2P与BT ，希望能大家研究与学习。这是纯C语言的版本。-By using C language to realize BT function to validate the powerful C language and a better understanding of P2P and BT, everyone hopes to study and learning. This is a pure C language versio