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Annotation of os2sdk/demos/examples/datetime/datetime.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Example of DOSGETDATETIME & DOSSETDATETIME usage
        !             3:  *
        !             4:  * These calls are used to set and get the current system time.
        !             5:  * Also shows the structure of the information returned.
        !             6:  *
        !             7:  *     - on an IBM AT, DOSSETDATETIME changes the hardware real time clock
        !             8:  *     - the system sets the 'timezone' value to -1 by default
        !             9:  *
        !            10:  * Compile as: cl -AL -G2 -Lp datetime.c
        !            11:  *
        !            12:  * Copyright (C) Microsoft Corp. 1986
        !            13:  */
        !            14: 
        !            15: #include  <doscalls.h>
        !            16: 
        !            17: main()
        !            18: {
        !            19:     struct DateTime curdt, newdt, setdt;
        !            20: 
        !            21:     /* Read current date and time */
        !            22:     DOSGETDATETIME(&curdt);
        !            23: 
        !            24:     /* Print date and time */
        !            25:     printf("TIME: %d:%02d:%02d.%02d  DATE: %d/%d/%d  DAY OF WEEK: %d\n",
        !            26:         curdt.hour,curdt.minutes,curdt.seconds,curdt.hundredths,
        !            27:         curdt.month,curdt.day,curdt.year,curdt.day_of_week);
        !            28:     /* NOTE: the system sets the 'timezone' value to -1 by default */
        !            29:     printf("GMT = local_time %+d minutes\n",curdt.timezone);
        !            30: 
        !            31: 
        !            32:     /* Set datetime struct to Thursday 12/25/86, 9:02:45.01pm PST */
        !            33:     setdt.hour          =   21; /* Time is in 24 hour format */
        !            34:     setdt.minutes       =    2;
        !            35:     setdt.seconds       =   45;
        !            36:     setdt.hundredths    =    1;
        !            37:     setdt.day           =   25;
        !            38:     setdt.month         =   12;
        !            39:     setdt.year          = 1986; /* Year should include the century */
        !            40:     setdt.timezone      =  480; /* PST is 8 hours after GMT (480 minutes) */
        !            41: 
        !            42:     /* Set system date and time */
        !            43:     DOSSETDATETIME(&setdt);
        !            44: 
        !            45:     /* Read new date and time just set */
        !            46:     DOSGETDATETIME(&newdt);
        !            47: 
        !            48:     /* Print date and time */
        !            49:     printf("TIME: %d:%02d:%02d.%02d  DATE: %d/%d/%d  DAY OF WEEK: %d\n",
        !            50:         newdt.hour,newdt.minutes,newdt.seconds,newdt.hundredths,
        !            51:         newdt.month,newdt.day,newdt.year,newdt.day_of_week);
        !            52:     printf("GMT = local_time %+d minutes\n",newdt.timezone);
        !            53: 
        !            54:     /* Reset date and time to whatever was read at the beginning */
        !            55:     DOSSETDATETIME(&curdt);
        !            56: }

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