difftime(3C)

NAME

     difftime - computes  the  difference  between  two  calendar
     times

SYNOPSIS

     #include <time.h>

     double difftime(time_t time1, time_t time0);

DESCRIPTION

     The difftime() function computes the difference between  two
     calendar times.

RETURN VALUES

     The difftime()  functions  returns  the  difference  (time1-
     time0) expressed in seconds as a double.

USAGE

     The difftime() function is provided  because  there  are  no
     general arithmetic properties defined for type time_t.

ATTRIBUTES

     See attributes(5) for descriptions of the  following  attri-
     butes:

     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | MT-Level                    | MT-Safe                     |
    |_____________________________|_____________________________|

SEE ALSO

     ctime(3C), attributes(5)