FA> How else could it calculate the difference between two numbers ? 
 FA> Care to post an example of advanced subtraction ?  :-)

 TT> But like I said before: nothing requires the units of a 
 TT> time_t to be seconds. It might be 1/100 seconds or even 
 TT> smaller units, or perhaps units larger than a second 
 TT> (comparable to the 2 seconds units that DOS uses in 

Well, there is a much simpler reason for difftime ... if time_t is signed
long, time_t can't hold the difference between two time_t's if they are
> 2 billion apart... thus forcing you to double.  :-)


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