小编Que*_*ner的帖子

在用任何语言编写代码时使用指针是否重要,例如C语言是否会占用更多内存.

感谢你

我对uint_fast16_t的格式有问题

    uint_fast16_t runningOrderNo;

    std::string ATNativeConnector::_GetNextClOrdId()
{

    time_t t = time(NULL);
    struct tm* tim = localtime(&t);

    std::stringstream sstr;
    char temp[10];
    sprintf(temp, "%02d%02d%02d%03u", tim->tm_hour, tim->tm_min, tim->tm_sec, ++runningOrderNo);
    sstr << temp; //<< std::setfill('0') << std::setw(2) << tim->tm_hour << tim->tm_min <<  tim->tm_sec << ++runningOrderNo;
    runningOrderNo %= 999;

    //LOG4CXX_DEBUG(logger,"Generated " << sstr.str() << " second:" << tim->tm_sec << " order id");
    return sstr.str();
}

我收到这样的警告.

ATNativeConnector.cpp:6156:95:警告:格式'%u'需要'unsigned int'类型的参数,但参数6的类型为'uint_fast16_t {aka long unsigned int}'[ - Wformat =]

我从这个页面尝试了不同的格式,如果有人会帮助我,我会感激不尽.