首先，这篇文章实现了两种方法查询IP，实现截图如下：

第一种方法时调用系统命令，代码如下：

#include
#include
using namespace std;
int main(int argc, char *argv[])
{
system("ipconfig");
system("PAUSE");
return EXIT_SUCCESS;
}

下面这种方法是对源码的解析：

#include
#include
#include
#include
#include
#include
#pragma comment(lib,"Ws2_32")
#pragma comment(lib,"Dnsapi")
#define Max 10 ;
//#include
#pragma comment(lib,"IPHlpApi")
void DoUsage(bool);
void DoRelease(bool);// realized
void DoRenew(bool);//realized
void DoDisplayDns(bool);
void DoFlushDns(bool);
void DoAll(void);
void GetInterfaceInfo(void);
//LPCTSTR GetNodeTypeName(UINT nodeType);
//LPCTSTR GetInterfaceTypeName(UINT InterfaceType);
IP_ADAPTER_INDEX_MAP adapterInfo;
PIP_INTERFACE_INFO pInfo;
DWORD checkReturn;
void main(int argc,char **argv)
{
bool doUsage=false;
bool doAll=false;
bool doRelease=false;
bool doRenew=false;
bool doDisplayDns=false;
bool doFlushDns=false;
char *argument; //store the command line code
argument=&argv[1][1];

if((argc>1)&&(argv[1][0]=='/'))
{
if(!strcmp(argument," "))
{
doUsage=true;
DoUsage(doUsage);
}
if(!strcmp(argument,"all"))
{
doUsage=true;
DoAll();


}

if(!strcmp(argument,"release"))
{
doRelease=true;
DoRelease(doRelease);
}

if(!strcmp(argument,"renew"))
{
doRenew=true;
DoRenew(doRenew);

}

if(!strcmp(argument,"displaydns"))
{
doDisplayDns=true;
DoDisplayDns(doDisplayDns);

}

if(!strcmp(argument,"flushdns"))
{
doFlushDns=true;
DoFlushDns(doFlushDns);

}

}
else
printf("error command code!");
printf("......................................");

}

/* get the using adapter information*/

void GetInterfaceInfo()
{

ULONG outBufferLen=0;
pInfo=(IP_INTERFACE_INFO *)malloc(sizeof(IP_INTERFACE_INFO));
/* Make the first call to buffer information*/
if((checkReturn=GetInterfaceInfo(pInfo,&outBufferLen))==ERROR_INSUFFICIENT_BUFFER)
{
free(pInfo);
pInfo=(IP_INTERFACE_INFO *)malloc(outBufferLen);

}

/* Make the second call of GetInterfaceInfo() to get the actual data */

if((checkReturn=GetInterfaceInfo(pInfo,&outBufferLen))==NO_ERROR)
{
adapterInfo=pInfo->Adapter[0];//关键此处返回IP_ADAPTER_INDEX_MAP 用于IP更新
printf("the dapter name is: %d ",pInfo->Adapter[0].Name);

}
else
{

printf("Get the interface information occer error!");

}

}

/* release IP address */

void DoRelease(bool doRelease)
{
if(doRelease)
{

GetInterfaceInfo();
/**the specific action to config/release*/
if((checkReturn=IpReleaseAddress(&adapterInfo))==NO_ERROR)
{
printf("the action of release IP work!");
}
else
printf("An error occured while releasing interface of %s",pInfo->Adapter[0].Name);

}
else
{
printf("illegal action");

}

}

/** Do renew IPAddree */

void DoRenew(bool doRenew)
{

if(doRenew)
{
GetInterfaceInfo();

if((checkReturn=IpRenewAddress(&adapterInfo))==NO_ERROR)
{
printf("the action of release IP work!");
}
else
printf("An error occured while releasing interface of %s",pInfo->Adapter[0].Name);

}

else
{
printf("illegal action");

}
}

/* display all information ipconfig/all */

void DoAll(void)

{

DWORD returnCheckError;
PFIXED_INFO pFixedInfo;
DWORD FixedInfoSize = 0;

PIP_ADDR_STRING pAddrStr;
PIP_ADAPTER_INFO pAdapt,pAdapterInfo;