trusty (3) difftime.3posix.gz

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NAME
       difftime - compute the difference between two calendar time values


SYNOPSIS
       #include <time.h>

       double difftime(time_t time1, time_t time0);


DESCRIPTION
       The  difftime() function shall compute the difference between two calendar times (as returned by time()):
       time1- time0.


RETURN VALUE
       The difftime() function shall return the difference expressed in seconds as a type double.


ERRORS
       No errors are defined.

       The following sections are informative.


EXAMPLES
       None.


APPLICATION USAGE
       None.


RATIONALE
       None.


FUTURE DIRECTIONS
       None.


SEE ALSO
       asctime() , clock() , ctime() , gmtime() , localtime() , mktime() , strftime() , strptime()  ,  time()  ,
       utime() , the Base Definitions volume of IEEE Std 1003.1-2001, <time.h>


       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition,
       Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open  Group  Base
       Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers,
       Inc and The Open Group. In the event of any discrepancy between this version and the  original  IEEE  and
       The  Open  Group  Standard,  the  original  IEEE and The Open Group Standard is the referee document. The
       original Standard can be obtained online at http://www.opengroup.org/unix/online.html .