Thread: Substract 2 date, one is current date

  1. #1
    Registered User
    Join Date
    Mar 2018

    Substract 2 date, one is current date

    I know this sounds stupid but I have never dealt with time before, only to generate random numbers in C
    My question is I have current time and a time in the past and I need to calculate the distance/diffence between them (I have exact hour and minute) so need to show time accurate up to minute

  2. #2
    and the hat of int overfl Salem's Avatar
    Join Date
    Aug 2001
    The edge of the known universe
    Like difftime / mktime in time.h.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.

  3. #3
    Programming Wraith GReaper's Avatar
    Join Date
    Apr 2009
    Cool... what's the problem? Just get the difference and divide by 60, like this:
    minsPassed = (curTime - prevTime)/60.0;
    Devoted my life to programming...

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