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When you specified V for RECFM parameter, LRECL value is largest record in the file plus 4 bytes. These four bytes contain the actual length of each variable length record in the file
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There are two ways to define a packed-decimal field. One is with COMP-3. Across different COBOL compilers, COMP-3 is not always packed-decimal. So, for new programs it is good to use PACKED-DECIMAL which is identical to using COMP-3, but is transportable to other compilers.
-3/2, so you need a signed number, which means the PICture string must start with an S. The field must contain an implied decimal-place (since the answer you need to hold is -1.5) so it needs a V. You need one digit before the decimal place, and one digit after.
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