Date: 2018mar1 OS: Windows Language: C/C++ Q. winsock2.h: Multiple declaration for 'fd_set' A. You can define WIN32_LEAN_AND_MEAN before including <windows.h> and it will not include winsock2.h

// Lean and mean avoids winsock.h which conflicts with winsock2 #define WIN32_LEAN_AND_MEAN #include <windows.h> #include <winsock2.h>