1. #include <winsock2.h>

  2. #include <iostream>

  3. using namespace std;

  4. #pragma comment(lib, "WS2_32.lib")

  6. void getIP()

  7. {

  8. WSADATA WSAData; //WSADATA结构被用来储存调用AfxSocketInit全局函数返回的Windows Sockets初始化信息。

  9. if (WSAStartup(MAKEWORD(2, 0),&WSAData)) // 初始化Windows sockets API

  10. {

  11. printf("WSAStartup failed %s\n", WSAGetLastError());

  12. exit(-1); //异常退出

  13. }

  15. char hostName[256];

  16. if(gethostname(hostName,sizeof(hostName))) //获取主机名

  17. {

  18. printf("Error: %u\n", WSAGetLastError());

  19. exit(-1);

  20. }

  22. hostent *host=gethostbyname(hostName); // 根据主机名获取主机信息(含IP)

  23. if(host==NULL)

  24. {

  25. printf("Error: %u\n", WSAGetLastError());

  26. exit(-1);

  27. }

  29. cout<<"正式的主机名: "<<host->h_name<<endl

  30. <<"主机地址类型: "<<host->h_addrtype<<endl

  31. <<"地址清单: "<<host->h_addr_list<<endl

  32. <<"别名列表: "<<host->h_aliases<<endl

  33. <<"地址长度: "<<host->h_length<<endl;

  35. for(int i=0;host->h_addr_list[i]!=0;i )

  36. {

  37. cout<<"该主机IP"<<i 1<<": "<<inet_ntoa(*(struct in_addr*)*host->h_addr_list)<<endl;

  38. }

  39. WSACleanup();

  40. }

  42. int main()

  43. {

  44. getIP();

  45. system("pause");

  46. return 0;

  47. }

全局配置自动获取ip地址（获取本机IP地址信息）(1)

,