编写服务端可能会遇到的第一个问题

最新推荐文章于 2018-08-09 14:41:00 发布

原创最新推荐文章于 2018-08-09 14:41:00 发布 · 862 阅读

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CC 4.0 BY-SA版权

文章标签：

#dll #function #user #output #build #file

本文介绍了一个关于使用WinSock进行网络编程时遇到的典型错误：无法解析外部符号__imp__WSACleanup@0和__imp__WSAStartup@8。通过在源文件中添加特定的库指令解决了该问题。

编写服务端代码如下：

#include <stdio.h>
#include <WinSock2.h>

void main()
{
WORD wVersionRequested;
WSADATA wsaData;
int err;

wVersionRequested = MAKEWORD( 2, 2 );
err = WSAStartup( wVersionRequested, &wsaData );
if ( err != 0 ) {
  /* Tell the user that we could not find a usable */
  /* WinSock DLL.                                  */
  return;
}

/* Confirm that the WinSock DLL supports 2.2.*/
/* Note that if the DLL supports versions greater    */
/* than 2.2 in addition to 2.2, it will still return */
/* 2.2 in wVersion since that is the version we      */
/* requested.                                        */

if ( LOBYTE( wsaData.wVersion ) != 2 ||
   HIBYTE( wsaData.wVersion ) != 2 ) {
  /* Tell the user that we could not find a usable */
  /* WinSock DLL.                                  */
  WSACleanup( );
  return;
}

/* The WinSock DLL is acceptable. Proceed. */

}

运行结果，报错如下：

1>------ Rebuild All started: Project: TCPSrv, Configuration: Debug Win32 ------
1>Deleting intermediate and output files for project 'TCPSrv', configuration 'Debug|Win32'
1>Compiling...
1>TcpSrv.cpp
1>Compiling manifest to resources...
1>Linking...
1>TcpSrv.obj : error LNK2019: unresolved external symbol __imp__WSACleanup@0 referenced in function _main
1>TcpSrv.obj : error LNK2019: unresolved external symbol __imp__WSAStartup@8 referenced in function _main
1>D:/Win32Project/TCPSrv/Debug/TCPSrv.exe : fatal error LNK1120: 2 unresolved externals
1>Build log was saved at "file://d:/Win32Project/TCPSrv/Debug/BuildLog.htm"
1>TCPSrv - 3 error(s), 0 warning(s)
========== Rebuild All: 0 succeeded, 1 failed, 0 skipped ==========