On 26 Aug 2008 08:04:56 -0700, in bit.listserv.ibm-main you wrote: >I Agree with the IF NOT NUMERIC. When you read data into an area, the >validity of the data is not checked. The Data Truncation Option on the >compiler does not check the validity of the data at runtime. It is up >to the application programmer to edit the data and check the validity of >that data. The "IF NOT NUMERIC and IF NUMERIC" is a great way to test >the validity of a alphanumeric field for numeric data. The way I >remember it, the programmer has to do a redefine of the field and give >it a PIC X characteristic, then issue an IF NOT NUMERIC on the >alphanumeric field.
I am not certain if PIC X(n) will allow sign zones on the low order byte. PIC S9(n) will allow plus and minus sign zones and may disallow fields without a sign on the specified position depending on the NUMPROC option. PIC 9(n) means that all digits must be numeric. And then there are the rules for SIGN IS SEPARATE. > >Regards, > >Don >-----Original Message----- >From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On >Behalf Of Mansell, George R. >Sent: Tuesday, August 26, 2008 9:52 AM >To: IBM-MAIN@BAMA.UA.EDU >Subject: Re: Enterprise COBOL v3.4.1 run time issue > >Pack of FOW123 followed by zap and unpack would do this without a data >exception. Only changes the zones C,D,E. Probably pic 999999 ==> pic >999999. Why not use If not numeric? > >-----Original Message----- >From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On >Behalf Of McKown, John >Sent: Tuesday, August 26, 2008 8:40 AM >To: IBM-MAIN@BAMA.UA.EDU >Subject: Re: Enterprise COBOL v3.4.1 run time issue > >> -----Original Message----- >> From: IBM Mainframe Discussion List >> [mailto:[EMAIL PROTECTED] On Behalf Of Paul Gilmartin >> Sent: Monday, August 25, 2008 9:45 AM >> To: IBM-MAIN@BAMA.UA.EDU >> Subject: Re: Enterprise COBOL v3.4.1 run time issue >> >> On Mon, 25 Aug 2008 08:26:19 -0600, Steve Comstock wrote: >> >> >K Zafirop wrote: >> >> >> >The value >> >> passed is the arithmetic truncation of the string. For example a >> >> string 'FOW123' is passed with value '666123'. >> > >> >I'm confused here. How can the string 'FOW123' have a value '666123'? >> >The string is its value. >> > >> It appears as if something is doing a Pack and ignoring data errors. >> >> -- gil > >There is no "data error" possible with a PACK instruction. The >programmer must validate that his input is valid before doing a PACK. >Now, it is possible that the PACK instruction will create output which >is not a valid packed decimal number. But that will not be detected >until another decimal instruction tries to use it (such as ZAP, or AP, >or SP, or ...). ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
