为什么socket（PF_INET，SOCK_STREAM，0）返回-1？

Question

I trying to create a socket application on visual studio c++, but I can't.

The problem is int listen_sock = socket(PF_INET,SOCK_STREAM,0) returns -1 and I don't know why...

What am I doing wrong?

Answer 1

What does WSAGetLastError return? Did you call WSAStartup before doing this call?

Answer 2

You should print the error (using GetLastError ). I suspect you are not initializing things:

WSADATA wsaData = {0};
WSAStartup(MAKEWORD(2, 2), &wsaData);