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difftime (3)
  • difftime (3) ( Solaris man: Библиотечные вызовы )
  • difftime (3) ( FreeBSD man: Библиотечные вызовы )
  • difftime (3) ( Русские man: Библиотечные вызовы )
  • difftime (3) ( Linux man: Библиотечные вызовы )
  • >> difftime (3) ( POSIX man: Библиотечные вызовы )
  •  

    NAME

    difftime - compute the difference between two calendar time values
     
    

    SYNOPSIS

    #include <time.h>

    double difftime(time_t time1, time_t time0);
     

    DESCRIPTION

    The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of IEEE Std 1003.1-2001 defers to the ISO C standard.

    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>  

    COPYRIGHT

    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 .


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUE
    ERRORS
    EXAMPLES
    APPLICATION USAGE
    RATIONALE
    FUTURE DIRECTIONS
    SEE ALSO
    COPYRIGHT


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