请教！！！！！

[cainiaodonggua]

//初始化SOCKET
WSADATA wsaData;
int iRet = WSAStartup(MAKEWORD(2,1), &wsaData);
if ( iRet != 0 )
{
printf( "WSAStartup Error:%d\n", GetLastError() );
exit( 0 );
}
int nRemoteAddr = inet_addr( argv[1] );
remoteHostent= (struct hostent*)malloc( sizeof(struct hostent ));
struct in_addr sa;
for ( int i = 0; i < numberOfHost; i ++ )
{
//获取远程机器名
sa.s_addr = nRemoteAddr;
printf( "\nIpAddress : %s\n", inet_ntoa( sa ) );
remoteHostent = gethostbyaddr( (char*)&nRemoteAddr,4, AF_INET );
函数WSAStartup(MAKEWORD(2,1), &wsaData)是如何理解的？
函数gethostbyaddr( (char*)&nRemoteAddr,4, AF_INET )又是如何理解的？

[Wolf0403]

幸亏这里是 CSDN。。。呵呵，在别的论坛你会挨骂的

The WSAStartup function initiates use of WS2_32.DLL by a process.

int WSAStartup(
WORD wVersionRequested,
LPWSADATA lpWSAData
);

Parameters
wVersionRequested
[in] Highest version of Windows Sockets support that the caller can use. The high-order byte specifies the minor version (revision) number; the low-order byte specifies the major version number.
lpWSAData
[out] Pointer to the WSADATA data structure that is to receive details of the Windows Sockets implementation.


The gethostbyaddr function retrieves the host information corresponding to a network address.

Note The gethostbyaddr function has been deprecated by the introduction of the getnameinfo function. Developers creating Windows Sockets 2 applications are urged to use the getnameinfo function instead of the gethostbyaddr function. See Remarks.


struct HOSTENT* FAR gethostbyaddr(
const char* addr,
int len,
int type
);

Parameters
addr
[in] Pointer to an address in network byte order.
len
[in] Length of the address, in bytes.
type
[in] Type of the address, such as the AF_INET address family type (defined as TCP, UDP, and other associated Internet protocols). Address family types and their corresponding values are defined in the Winsock2.h header file.
Return Values