relating date....

This is a discussion on relating date.... within the C Programming forums, part of the General Programming Boards category; ->How can I find the day of the week given the date?...

  1. #1
    Prakash
    Guest

    relating date....

    ->How can I find the day of the week given the date?

  2. #2
    Has a Masters in B.S.
    Join Date
    Aug 2001
    Posts
    2,267
    ths is straight from the MSDN

    Code:
    /* TIMES.C illustrates various time and date functions including:
     *      time            _ftime          ctime       asctime
     *      localtime       gmtime          mktime      _tzset
     *      _strtime        _strdate        strftime
     *
     * Also the global variable:
     *      _tzname
     */
    
    #include <time.h>
    #include <stdio.h>
    #include <sys/types.h>
    #include <sys/timeb.h>
    #include <string.h>
    
    void main()
    {
        char tmpbuf[128], ampm[] = "AM";
        time_t ltime;
        struct _timeb tstruct;
        struct tm *today, *gmt, xmas = { 0, 0, 12, 25, 11, 93 };
    
        /* Set time zone from TZ environment variable. If TZ is not set,
         * the operating system is queried to obtain the default value 
         * for the variable. 
         */
        _tzset();
    
        /* Display operating system-style date and time. */
        _strtime( tmpbuf );
        printf( "OS time:\t\t\t\t%s\n", tmpbuf );
        _strdate( tmpbuf );
        printf( "OS date:\t\t\t\t%s\n", tmpbuf );
    
        /* Get UNIX-style time and display as number and string. */
        time( &ltime );
        printf( "Time in seconds since UTC 1/1/70:\t%ld\n", ltime );
        printf( "UNIX time and date:\t\t\t%s", ctime( &ltime ) );
    
        /* Display UTC. */
        gmt = gmtime( &ltime );
        printf( "Coordinated universal time:\t\t%s", asctime( gmt ) );
    
        /* Convert to time structure and adjust for PM if necessary. */
        today = localtime( &ltime );
        if( today->tm_hour > 12 )
        {
       strcpy( ampm, "PM" );
       today->tm_hour -= 12;
        }
        if( today->tm_hour == 0 )  /* Adjust if midnight hour. */
       today->tm_hour = 12;
    
        /* Note how pointer addition is used to skip the first 11 
         * characters and printf is used to trim off terminating 
         * characters.
         */
        printf( "12-hour time:\t\t\t\t%.8s %s\n",
           asctime( today ) + 11, ampm );
    
        /* Print additional time information. */
        _ftime( &tstruct );
        printf( "Plus milliseconds:\t\t\t%u\n", tstruct.millitm );
        printf( "Zone difference in seconds from UTC:\t%u\n", 
                 tstruct.timezone );
        printf( "Time zone name:\t\t\t\t%s\n", _tzname[0] );
        printf( "Daylight savings:\t\t\t%s\n", 
                 tstruct.dstflag ? "YES" : "NO" );
    
        /* Make time for noon on Christmas, 1993. */
        if( mktime( &xmas ) != (time_t)-1 )
       printf( "Christmas\t\t\t\t%s\n", asctime( &xmas ) );
    
        /* Use time structure to build a customized time string. */
        today = localtime( &ltime );
    
        /* Use strftime to build a customized time string. */
        strftime( tmpbuf, 128,
             "Today is %A, day %d of %B in the year %Y.\n", today );
        printf( tmpbuf );
    }
    
    
    
    Output
    
    OS time:                                21:51:03
    OS date:                                05/03/94
    Time in seconds since UTC 1/1/70:       768027063
    UNIX time and date:                     Tue May 03 21:51:03 1994
    Coordinated universal time:             Wed May 04 04:51:03 1994
    12-hour time:                           09:51:03 PM
    Plus milliseconds:                      279
    Zone difference in seconds from UTC:    480
    Time zone name:                         
    Daylight savings:                       YES
    Christmas                               Sat Dec 25 12:00:00 1993
    
    Today is Tuesday, day 03 of May in the year 1994.
    ADVISORY: This users posts are rated CP-MA, for Mature Audiences only.

  3. #3
    Skunkmeister Stoned_Coder's Avatar
    Join Date
    Aug 2001
    Posts
    2,572
    like this.....
    Attached Files Attached Files
    Free the weed!! Class B to class C is not good enough!!
    And the FAQ is here :- http://faq.cprogramming.com/cgi-bin/smartfaq.cgi

  4. #4
    Registered User
    Join Date
    Aug 2001
    Posts
    46

    Angry

    Go to the market. Buy a calender. Check the date of the last sunday before the given date and subtract it from the given date. You will get the no of days. Now SHUT UP and start doing some work on your own.

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