获取计算机MAC 和IP 地址

#include <stdio.h>
#include <Windows.h>
#include <Iphlpapi.h>
#include <Assert.h>
#pragma comment(lib, "iphlpapi.lib")

char* getMAC();

int main(){ 
    getMAC();
    system("pause");
}
char* getMAC(){
PIP_ADAPTER_INFO AdapterInfo;
DWORD dwBufLen = sizeof(AdapterInfo);
char *mac_addr = (char*)malloc(17);

AdapterInfo = (IP_ADAPTER_INFO *) malloc(sizeof(IP_ADAPTER_INFO));
if (AdapterInfo == NULL) {
printf("Error allocating memory needed to call GetAdaptersinfo\n");

}

// Make an initial call to GetAdaptersInfo to get the necessary size into the dwBufLen     variable
if (GetAdaptersInfo(AdapterInfo, &dwBufLen) == ERROR_BUFFER_OVERFLOW) {

AdapterInfo = (IP_ADAPTER_INFO *) malloc(dwBufLen);
if (AdapterInfo == NULL) {
printf("Error allocating memory needed to call GetAdaptersinfo\n");
 }
 }

if (GetAdaptersInfo(AdapterInfo, &dwBufLen) == NO_ERROR) {
PIP_ADAPTER_INFO pAdapterInfo = AdapterInfo;// Contains pointer to current adapter info
do {
sprintf(mac_addr, "%02X:%02X:%02X:%02X:%02X:%02X",
pAdapterInfo->Address[0], pAdapterInfo->Address[1],
pAdapterInfo->Address[2], pAdapterInfo->Address[3],
pAdapterInfo->Address[4], pAdapterInfo->Address[5]);
printf("Address: %s, mac: %s\n", pAdapterInfo->IpAddressList.IpAddress.String, mac_addr);
return mac_addr;

printf("\n");
pAdapterInfo = pAdapterInfo->Next;        
}while(pAdapterInfo);                        
}
free(AdapterInfo);
}