void PrintBuffer(void* pBuff, unsigned int nLen){    if (NULL == pBuff || 0 == nLen)    {        return;    }    const int nBytePerLine = 16;    unsigned char* p = (unsigned char*)pBuff;    char szHex[3*nBytePerLine+1] = {0};    printf("-----------------begin-------------------\n");    for (unsigned int i=0; i<nLen; ++i)    {        int idx = 3 * (i % nBytePerLine);        if (0 == idx)        {            memset(szHex, 0, sizeof(szHex));        }#ifdef WIN32        sprintf_s(&szHex[idx], 4, "%02x ", p[i]);// buff长度要多传入1个字节#else        snprintf(&szHex[idx], 4, "%02x ", p[i]); // buff长度要多传入1个字节#endif                // 以16个字节为一行，进行打印        if (0 == ((i+1) % nBytePerLine))        {            printf("%s\n", szHex);        }    }    // 打印最后一行未满16个字节的内容    if (0 != (nLen % nBytePerLine))    {        printf("%s\n", szHex);    }    printf("------------------end-------------------\n");}