1 // ConsoleApplication12.cpp : This file contains the 'main' function. Program execution begins and ends there.
  2 //
  3 #include <winsock2.h>
  4 #include <windows.h>
  5 #include <WS2tcpip.h>
  6 #include <IPTypes.h>
  7 #include <iphlpapi.h>
  8 #include <iostream>
  9
 
 
 10 #pragma comment(lib, "ws2_32.lib")
 11 #pragma comment(lib, "IPHLPAPI.lib")
 12 
 13 using namespace std;
 14 
 15 
 16 
 17 void get_local_ip()
 18 {
 19     ULONG rCode = 0;
 20     ULONG Length = sizeof(IP_ADAPTER_INFO);
 21     std::string IpAddr;
 22 
 23     PIP_ADAPTER_INFO pIpAdapterInfo = new
 
 IP_ADAPTER_INFO();
 24 
 25     rCode = GetAdaptersInfo(pIpAdapterInfo, &Length);
 26 
 27     if (ERROR_BUFFER_OVERFLOW == rCode) {
 28         //重新申請記憶體空間用來儲存所有網絡卡資訊        
 29         delete pIpAdapterInfo;
 30         pIpAdapterInfo = (PIP_ADAPTER_INFO)new BYTE[Length];
 31         rCode = GetAdaptersInfo(pIpAdapterInfo, &Length);
 32
 
     }
 33     if (rCode == ERROR_SUCCESS) {
 34         //返回第一張網絡卡的第一個IP地址
 35         for (UINT i = 0; i < 16; i++) {
 36             if (!pIpAdapterInfo->IpAddressList.IpAddress.String[i])
 37                 break;
 38 
 39             IpAddr += pIpAdapterInfo->IpAddressList.IpAddress.String[i];
 40 
 41         }
 42     }
 43     if (pIpAdapterInfo) {
 44         delete pIpAdapterInfo;
 45     }
 46     cout << IpAddr.c_str() << endl;
 47     //return IpAddr;
 48 }
 49 
 50 
 51 int main()
 52 {
 53     get_local_ip();
 54     //cout << ip.c_str() << endl;
 55     std::cout << "Hello World!\n" << endl;
 56     getchar();
 57 }
 58