//获取本地所有IP地址#include 
     
      #include 
      
       #pragma comment(lib,"ws2_32.lib")　　int doit(int, char **){char host_name[255];//获取本地主机名称if (gethostname(host_name, sizeof(host_name)) == SOCKET_ERROR) {printf("Error %d when getting local host name.n", WSAGetLastError());return 1;}printf("Host name is: %sn", host_name);　　//从主机名数据库中得到对应的“主机”struct hostent *phe = gethostbyname(host_name);if (phe == 0) {printf("Yow! Bad host lookup.");return 1;}　　//循环得出本地机器所有IP地址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));printf("Address %d : %sn" , i, inet_ntoa(addr));}　　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;}