difftime(3)                                                 difftime(3)

  difftime()

  NAME

    difftime() - compute difference between two times

  SYNOPSIS

    #include 

    double difftime (time_t time1, time_t time0)

  DESCRIPTION

    The difftime(3) function returns the difference between two calendar
    times, (time1 - time0), expressed in seconds.

    External declarations as well as the tm structure definition are in the
     include file.

  SEE ALSO

    date(1)

    asctime(3)

    ctime(3)

    gettimeofday(3)

    gmtime(3)

    getenv(3)

    localtime(3)

    time(2)

  USAGE NOTES

    The difftime function is thread safe.

    The difftime function is not async-signal safe.