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ZEROS and ZEROES in COBOL.

 
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shobha acharya

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Joined: 29 Jul 2010
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Location: Bangalore

PostPosted: Thu Jul 29, 2010 1:53 pm    Post subject: ZEROS and ZEROES in COBOL.
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Could anyone explain the difference between ZEROS and ZEROES in COBOL?
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ofer71

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PostPosted: Thu Jul 29, 2010 2:26 pm    Post subject:
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No difference, simply synonyms, as you can see in the fine manual.

Quote:
Figurative constants are reserved words that name and refer to specific constant values. The reserved words for figurative constants and their meanings are:

ZERO/ZEROS/ZEROES
Represents the numeric value zero (0), or one or more occurrences of the character zero (0), depending on context.
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Robert Sample

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PostPosted: Thu Jul 29, 2010 4:24 pm    Post subject:
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The E?
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Bill O'Boyle

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PostPosted: Thu Jul 29, 2010 5:09 pm    Post subject: Reply to: ZEROS and ZEROES in COBOL.
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This also applies to the other figurative constants, such as LOW-VALUE/LOW-VALUES, SPACE/SPACES, HIGH-VALUE/HIGH-VALUES, etc.

Usage of a literal as opposed to its figurative constant can cause unexpected differences. EG:

Code:

03  WS-FIELD PIC  X(256).

MOVE '0'  TO WS-FIELD.
MOVE ZERO TO WS-FIELD.

In the first MOVE, WS-FIELD's first-byte will contain a '0', followed by 255 spaces, whereas, in the second MOVE, WS-FIELD will contain ALL '0's.

The motto here is to always use the figurative constant associated with the field's data-type and the compiler will take care of the rest.

Bill
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