今天是第一天学网络编程,遇到一个问题倍受打击!有那位仁兄帮我解决!
我还照书上编的,居然没有运行起!郁闷!
每次编译是正确,但链接的是时候提示:
inking...
ping.obj : error LNK2001: unresolved external symbol _WSACleanup@0
ping.obj : error LNK2001: unresolved external symbol _gethostbyaddr@12
ping.obj : error LNK2001: unresolved external symbol _inet_addr@4
ping.obj : error LNK2001: unresolved external symbol _inet_ntoa@4
ping.obj : error LNK2001: unresolved external symbol _gethostbyname@4
ping.obj : error LNK2001: unresolved external symbol _WSAStartup@8
LIBCD.lib(crt0.obj) : error LNK2001: unresolved external symbol _main
Debug/ping.exe : fatal error LNK1120: 7 unresolved externals
Error executing link.exe.
ping.exe - 8 error(s), 0 warning(s)
我以为是库的问题,然后我加了库还是不行!
源码如下:
#include <stdio.h>
#include "windows.h"
#include "winsock.h"
#define PROG_NAME "DNS Lookup"
#define HOST_NAME "YOUR.COM"
#define WINSOCK_VERSION 0x0101
#define PF_INET_LENGTH 4
#define HOST_ADDR "192.168.11.229"
int PASCAL WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
// TODO: Place code here.
WSADATA wsaData;
LPHOSTENT lpHostEnt;
DWORD dwIPAddr;
LPSTR szIPAddr;
if(WSAStartup(WINSOCK_VERSION,&wsaData))
MessageBox(NULL,"Could not load Windows Socktes DLL.",PROG_NAME,
MB_OK|MB_ICONSTOP);
else
{
lpHostEnt=gethostbyname(HOST_NAME);
if(!lpHostEnt)
MessageBox(NULL,"Could not get IP address!",HOST_NAME,
MB_OK|MB_ICONSTOP);
else
{
szIPAddr=inet_ntoa(*(LPIN_ADDR)*(lpHostEnt->h_addr_list));
MessageBox(NULL,szIPAddr,lpHostEnt->h_name,
MB_OK|MB_ICONSTOP);
}
dwIPAddr=inet_addr(HOST_ADDR);
if(dwIPAddr==INADDR_NONE)
MessageBox(NULL,"Invalid Internet address!",HOST_ADDR,
MB_OK|MB_ICONSTOP);
else
{
lpHostEnt=gethostbyaddr((LPSTR)&dwIPAddr,PF_INET_LENGTH,PF_INET);
if(!lpHostEnt)
MessageBox(NULL,"Could not get host name!",HOST_ADDR,
MB_OK|MB_ICONSTOP);
else
MessageBox(NULL,lpHostEnt->h_name,HOST_ADDR,
MB_OK|MB_ICONINFORMATION);
}
}
WSACleanup();
return(NULL);
}