[CVI2015] Haw can I get an old date from the current date ?

[HoussamAz]

Hello, 

I'm getting the current system date. 

I need to get the last week date. So : 

if current date = 22/03/2018 => last week = 15/03/2018

if current date = 02/03/2018 => last week = 23/02/2018

if current date = 02/04/2018 => last week = 26/03/2018

etc.... 

Any ideas please ? 

Thanks ! 

[venusnajad56]

i suppose that you can use:

GetSystemDate (&month2, &day2, &year2);
sprintf (TimeBuffer, "%02i- %02i / %02i", day2+8, month2-1, year2);

or:

GetSystemDate (&month2, &day2, &year2);
sprintf (TimeBuffer, "%02i- %02i / %02i", day2+24, month2-1, year2);

[CVI-User · Accepted solution]

I propose the use of "CVI Time" from the Utility Library:

t = GetCurrentCVIAbsoluteTime()

CVITimeIntervalFromTimeUnit (CVITimeUnitDays, 7, &i);

DecrementCVIAbsoluteTime (&t, i);

CVIAbsoluteTimeToLocalCalendar( ... );

[HoussamAz]

Hello venusnajad56, 

The main idea is to not be obliged to calculate the date .... otherwise, I have to implement many cases. 

I'm looking for something "automatic". 

[HoussamAz]

Hello CVI-User, 

It's the solution. Thank you.