void    get_date_str_ex1()
{
    SYSTEMTIME st;
    GetSystemTime(&st);              // gets current time, 
    // need to convert to local time
    FILETIME ft, ftLocal;
    SystemTimeToFileTime(&st, &ft);
    FileTimeToLocalFileTime(&ft, &ftLocal);
    FileTimeToSystemTime(&ftLocal, &st);
    double dDate;
    SystemTimeToJulianDate(&dDate, &st);
    out_str(get_date_str(dDate, LDF_SHORT_AND_HHMMSS_SEPARCOLON));
}

void TestSeconds()
{
	// Get right now as a Julian Date.
	double dNow = NowAsJulian();

	// Create some sort of date time string from past and convert it to Julian Date.
	string strThen = "10/12/2017 12:19:00";
	double dThen;
	str_to_date_custom(strThen, "MM/dd/yyyy HH:mm:ss", &dThen);

	// Subtract the two Julian Dates, multiply by 86400 to get seconds and round to 0 decimal places.
	double dSeconds = round((dNow - dThen)*86400, 0);
	out_double("Seconds=", dSeconds);
}

// Get current datetime in Julian Date
double NowAsJulian()
{
	time_t ltime;
	time( <ime );
	
	TM* tmNow = localtime( <ime );

	SYSTEMTIME SysTime; 
	tm_to_systemtime(tmNow, &SysTime);	
    
    double date;
    SystemTimeToJulianDate(&date, &SysTime); 
    return date;
}

quote:

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Originally posted by Chris D

Hi,

Do you need to use the datetimes for any other purpose than to simply calculate the difference in seconds? That is, do you plan to do something with the converted string?

Also, are you interested in rounding to whole seconds or getting fractional seconds?

Thanks,
Chris Drozdowski
Originlab Technical Support

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