构造函数中是否可以调用虚函数
https://blog.csdn.net/sumup/article/details/78174915
C++函数重载
https://blog.csdn.net/u013982161/article/details/52749146
C++ 多态的实现及原理
https://www.cnblogs.com/Allen-rg/p/6927129.html
https://www.cnblogs.com/cxq0017/p/6074247.html
多线程
https://www.cnblogs.com/lpxblog/p/5190438.html
https://blog.csdn.net/qq_24637797/article/details/48001519
https://blog.csdn.net/zyj_zhouyongjun183/article/details/80247784
https://blog.csdn.net/u014679804/article/details/49464677
VS C++ 共享内存 CreateFileMapping
https://blog.csdn.net/youshijian99/article/details/80438492
https://blog.csdn.net/tongsean/article/details/60638046
长连接和短连接
https://blog.csdn.net/ideality_hunter/article/details/77712242
linux创建子进程--fork()方法