98 lines
6.6 KiB
HTML
98 lines
6.6 KiB
HTML
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<meta name="DC.Title" content="Example: Perform date arithmetic" />
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<meta name="abstract" content="This program illustrates how to write a CL program that adds or subtracts a given number of days for the current system date." />
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<meta name="description" content="This program illustrates how to write a CL program that adds or subtracts a given number of days for the current system date." />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Example: Perform date arithmetic</title>
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</head>
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<body id="datearith"><a name="datearith"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Example: Perform date arithmetic</h1>
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<div><p>This program illustrates how to write a CL program that adds or
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subtracts a given number of days for the current system date.</p>
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<div class="section"><div class="note"><span class="notetitle">Note:</span> Read the <a href="codedisclaimer.htm">Code license and disclaimer information</a> for important
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legal information.</div>
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<pre>/* Calculate new date from current system date. Pass negative */
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/* number to subtract, positive number to add */
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/* */
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/* The first parameter is a character 8 date in YYYYMMDD format */
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/* or the special value *CURRENT */
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/* */
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/* The second parameter is a decimal value for the number of days */
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/* to adjust the first parameter by */
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/* */
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/* Test cases: CALL CALCDATE (*CURRENT -5) */
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/* CALL CALCDATE (*CURRENT 5) */
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/* CALL CALCDATE ('20030225' -90) */
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/* CALL CALCDATE ('30020228' 90) */
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/* */
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/* There is no error handling in this sample, so make sure the */
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/* input dates are valid (that is, no 20031325). The valid date */
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/* date range is Oct 14 1582 to Dec 31 9999 */
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/* */
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PGM PARM(&curdate &DAYSTOCHG)
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DCL VAR(&CURDATE) TYPE(*CHAR) LEN(8)
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DCL VAR(&DAYSTOCHG) TYPE(*DEC) LEN(15 5)
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DCL VAR(&DATETIME) TYPE(*CHAR) LEN(17)
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DCL VAR(&DATE) TYPE(*CHAR) LEN(8)
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DCL VAR(&LILDATEINT) TYPE(*CHAR) LEN(4)
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DCL VAR(&LILDATEDEC) TYPE(*DEC) LEN(10 0)
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DCL VAR(&ERRCOD) TYPE(*CHAR) LEN(4) +
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VALUE(X'00000000')
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DCL VAR(&MSG) TYPE(*CHAR) LEN(50)
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IF COND(&CURDATE = '*CURRENT') THEN(DO)
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CALL PGM(QWCCVTDT) PARM('*CURRENT' ' ' '*YYMD' +
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&DATETIME &ERRCOD) /* Get current system +
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date and time in YYYYMMDD */
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CHGVAR VAR(&DATE) VALUE(%SST(&DATETIME 1 8)) /* Get +
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just the date portion */
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ENDDO
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ELSE CMD(CHGVAR VAR(&DATE) VALUE(&CURDATE)) /* +
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Use the date provided */
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CALLPRC PRC(CEEDAYS) PARM(&DATE 'YYYYMMDD' +
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&LILDATEINT *OMIT) /* Get Lilian date for +
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current date */
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CHGVAR VAR(&LILDATEDEC) VALUE(%BIN(&LILDATEINT)) /* +
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Get Lilian date in decimal format */
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CHGVAR VAR(&LILDATEDEC) VALUE(&LILDATEDEC + +
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&DAYSTOCHG) /* Adjust specified number +
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of days */
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CHGVAR VAR(%BIN(&LILDATEINT)) VALUE(&LILDATEDEC) /* +
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Get Lilian date in integer format */
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CALLPRC PRC(CEEDATE) PARM(&LILDATEINT 'YYYYMMDD' +
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&DATE *OMIT) /* Return calculated date in +
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YYYYMMDD format */
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CHGVAR VAR(&MSG) VALUE('The new date is ' *CAT &DATE)
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SNDPGMMSG MSG(&MSG) TOPGMQ(*EXT)
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ENDPGM </pre>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="sampl.htm" title="These sample programs demonstrate the flexibility, simplicity, and versatility of CL programs.">Examples: CL programs and procedures</a></div>
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</div>
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</div>
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</body>
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