I want to develope a net game which uses C/S frame,so I need to use socket connect.
At first I use cocos2d-x to make the game in win32 ,then I’ll transplant the game to iOS and Android .
Walzer has told me that I can use Bsd Socket,but I don’t know how to use Bsd Socket in win32 and how to compile Bsd Socket in iOS and Android.
If anyone know the answer or any useful informations(websites,documents,codes…)， please tell me ,thank you very very much. 
I just found some bsd socket codes for Linux like this ….(<sys/socket.h>…),
but I can’t use them in win32,.
someone told me that I can use (#include <winsock2.h> #pragma comment(lib, “ws2_32.lib”) ) instead in win32,
if I use <winsock2.h> and so on , can I transplant these code to iOS and Android???
U should use odsocket,it can use for all the platform
Apple has some documentation on this: https://developer.apple.com/library/ios/documentation/NetworkingInternet/Conceptual/NetworkingTopics/Articles/UsingSocketsandSocketStreams.html
I haven’t done any Win32 socket development in a long time, bit IIRC you might want to look at WinSock
http://tangentsoft.net/wskfaq/articles/bsd-compatibility.html
There are some cross-platform socket libraries around. I’m not sure if I would use one. I sort of subscribe to doing the platform native way when you get this low-level, but check out: http://sourceforge.net/projects/netlinksockets/
Compiling and creating a Socket Communication Layer for a game is one of the hardest job. With a few experience in network communication for Game/Application I have some suggestion for you. With some following steps:
1 . Write a basic connection socket. (I am using Google Protocol Buffer). Compile it for iOS, Android, WP successful.
2. Write a message handler for that connection, preprocess, save data to a data-store in phone, send message back, etc.
3. Write a NetworkManager Layer which will work with some Message Handler, Read data form Data-Store, etc.
4. Improve them for your game.