#include <iostream.h>
#include <winsock.h>int doit(int, char **)
{
char ac[80];
if (gethostname(ac, sizeof(ac)) == SOCKET_ERROR) {
cerr << "Error " << WSAGetLastError() <<
" when getting local host name." << endl;
return 1;
}
cout << "Host name is " << ac << "." << endl; struct hostent *phe = gethostbyname(ac);
if (phe == 0) {
cerr << "Yow! Bad host lookup." << endl;
return 1;
} for (int i = 0; phe->h_addr_list[i] != 0; ++i) {
struct in_addr addr;
memcpy(&addr, phe->h_addr_list[i], sizeof(struct in_addr));
cout << "Address " << i << ": " << inet_ntoa(addr) << endl;
}
return 0;
}int main(int argc, char *argv[])
{
WSAData wsaData;
if (WSAStartup(MAKEWORD(1, 1), &wsaData) != 0) {
return 255;
} int retval = doit(argc, argv); WSACleanup(); return retval;
}提示:
-------------------Configuration: getip - Win32 Debug--------------------
Compiling...
getip.cpp
Linking...
getip.obj : error LNK2001: unresolved external symbol _inet_ntoa@4
getip.obj : error LNK2001: unresolved external symbol _gethostbyname@4
getip.obj : error LNK2001: unresolved external symbol _WSAGetLastError@0
getip.obj : error LNK2001: unresolved external symbol _gethostname@8
getip.obj : error LNK2001: unresolved external symbol _WSACleanup@0
getip.obj : error LNK2001: unresolved external symbol _WSAStartup@8
LIBCD.lib(wincrt0.obj) : error LNK2001: unresolved external symbol _WinMain@16
Debug/getip.exe : fatal error LNK1120: 7 unresolved externals
Error executing link.exe.getip.exe - 8 error(s), 0 warning(s)
#include <winsock.h>int doit(int, char **)
{
char ac[80];
if (gethostname(ac, sizeof(ac)) == SOCKET_ERROR) {
cerr << "Error " << WSAGetLastError() <<
" when getting local host name." << endl;
return 1;
}
cout << "Host name is " << ac << "." << endl; struct hostent *phe = gethostbyname(ac);
if (phe == 0) {
cerr << "Yow! Bad host lookup." << endl;
return 1;
} for (int i = 0; phe->h_addr_list[i] != 0; ++i) {
struct in_addr addr;
memcpy(&addr, phe->h_addr_list[i], sizeof(struct in_addr));
cout << "Address " << i << ": " << inet_ntoa(addr) << endl;
}
return 0;
}int main(int argc, char *argv[])
{
WSAData wsaData;
if (WSAStartup(MAKEWORD(1, 1), &wsaData) != 0) {
return 255;
} int retval = doit(argc, argv); WSACleanup(); return retval;
}提示:
-------------------Configuration: getip - Win32 Debug--------------------
Compiling...
getip.cpp
Linking...
getip.obj : error LNK2001: unresolved external symbol _inet_ntoa@4
getip.obj : error LNK2001: unresolved external symbol _gethostbyname@4
getip.obj : error LNK2001: unresolved external symbol _WSAGetLastError@0
getip.obj : error LNK2001: unresolved external symbol _gethostname@8
getip.obj : error LNK2001: unresolved external symbol _WSACleanup@0
getip.obj : error LNK2001: unresolved external symbol _WSAStartup@8
LIBCD.lib(wincrt0.obj) : error LNK2001: unresolved external symbol _WinMain@16
Debug/getip.exe : fatal error LNK1120: 7 unresolved externals
Error executing link.exe.getip.exe - 8 error(s), 0 warning(s)
试试这个头文件winsock2.h
thanks!
请说说原因,另外叶君临的#pragma comment (lib, Ws2_32.lib)
为什么不对!