实际编程中，MAC地址多用整型来表示，如unsigned long long等。整型对于机器是友好的，对于编码人员就不那么友好了，毕竟我们还是喜欢用string类型的MAC地址，如“00-00-00-00-00-00”，下面就写了个简单的小方法，供参考、使用；
#include "stdafx.h"#include <iostream>#include <string>#include <sstream>using namespace std;typedef unsigned long long UNLONG_64;string macToStr(UNLONG_64& ulMac){string strMac = "00-00-00-00-00-00";string strMacTmp;UNLONG_64 ulMacTmp = ulMac;char chHex[17] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};chHex[16] = ' ';for (int i = 0; i < 12; i++){strMacTmp = chHex[ulMacTmp & 0x0F] + strMacTmp;ulMacTmp = ulMacTmp >> 4;if (0 == (i+1)%2 && i < 10){strMacTmp = '-' + strMacTmp;}if (0 == ulMacTmp){break;}}strMac = strMac.replace(17 - strMacTmp.length(), 17, strMacTmp);return strMac;}