title: Does c++ time difference function calculate daylight savings?
body: <p>If I use the C++ time difference (timediff) function to caculate a the difference between 2 times and the later time is after the time change for day light savings will the returned difference caculate this.</p>
  
  <p>E.g. I have a time of 23:00 and a time of 11:00. The time changes in the middle of this time i.e it goes forward one hour.</p>
  
  <p>Will I get 12 hours or 11 difference?</p>