https://blog.csdn.net/skc361/article/details/9254507
https://blog.csdn.net/HK_5788/article/details/41257133
https://blog.csdn.net/caowei880123/article/details/8266252
前面的都是将WSAGetLastError()函数
https://www.cnblogs.com/rohens-hbg/p/7921344.html
时间函数
