学步园

 VC 获取本机名字和IP地址

void GetHostAddr( OUT char *ipAddr, OUT char *hostName )
{
	char hostname[100]; 
	int res = gethostname(hostname, sizeof(hostname)); 
	if(res != 0) return ; 
	memcpy(hostName, hostname, 100);
	hostent* pHostent = gethostbyname(hostname); 
	if (pHostent==NULL) return ; 

	hostent& he = *pHostent; 
	sockaddr_in sa;  // 可以直接用 in_addr addr;
	// addr.s_addr = *((unsigned long*)pHostent->h_addr_list[0]);
	// CString ip = inet_ntoa(addr.s_addr); //返回的是 char * 类型
	memcpy(&sa.sin_addr.s_addr, pHostent->h_addr_list[0], pHostent->h_length);
	strcpy(ipAddr, inet_ntoa(sa.sin_addr));
//	ipAddr = inet_ntoa(sa.sin_addr); 
}

使用：

#include <winsock.h> 

WORD wVersionRequested = MAKEWORD(1, 1);
WSADATA wsaData;

if (WSAStartup(wVersionRequested, &wsaData))
return 0;

char ip[100], name[100];

GetHostAddr(ip, name); 即可获取ip和name

WSACleanup();