如何解决此winsock错误？

Question

C:\Users\Chan\Desktop\test - fail\winsock2 socket server.cpp: In function `int _tmain()':
C:\Users\Chan\Desktop\test - fail\winsock2 socket server.cpp:48: error: `getaddrinfo' was not declared in this scope
C:\Users\Chan\Desktop\test - fail\winsock2 socket server.cpp:59: error: `freeaddrinfo' was not declared in this scope
C:\Users\Chan\Desktop\test - fail\winsock2 socket server.cpp:68: error: `freeaddrinfo' was not declared in this scope
C:\Users\Chan\Desktop\test - fail\winsock2 socket server.cpp:74: error: `freeaddrinfo' was not declared in this scope

Using this header files

#include "winsock2.h"
#include "windows.h"
#include "WS2tcpip.h"

Answer 1

The header file WS2tcpip.h uses this define:

#if (_WIN32_WINNT >= 0x0600)

This means that in your build you should define _WIN32_WINNT to 0x600 (Vista) or higher. This means that the API you want doesn't exist in WinXP.