获取x86机器的定时器计数值，换算成秒并打印

++
__int64 read_QPC()
{
    LARGE_INTEGER count;
    QueryPerformanceCounter(&count);
    return count.QuadPart;
}

double get_time()
{
    static LARGE_INTEGER freq;
    QueryPerformanceFrequency(&freq);
    return read_QPC() / (double)freq.QuadPart;
}

int main()
{
    printf("%f", get_time());
    return 0;
}