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Cobol pointers

 
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naveenmundhra

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Joined: 24 Feb 2008
Posts: 3
Location: hyderabad, India

PostPosted: Thu Jun 10, 2010 2:19 pm    Post subject: Cobol pointers
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Hi All

I want to know what is the difference between the below statements -

1. SET ADDRESS OF var-1 to ADDRESS OF var-2

2. SET var-1 to ADDRESS OF var-2

3. SET ADDRESS OF var-1 to var-2
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dbzTHEdinosauer

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Joined: 20 Oct 2006
Posts: 6970
Location: porcelain throne

PostPosted: Thu Jun 10, 2010 2:39 pm    Post subject:
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depends on how var-1 and var2 are defined.

of example 1 and example 2, one is incorrect.

either var-1 is a data item or a pointer; same for var-2.
they can't be both.

pointers contain addresses
linkage data items can be addressed by SETting their address to a pointer or to the address of a another data item (which previously has addressability)

if you are still in quandry, look here, and here

in short:

1. SET ADDRESS OF var-1 to ADDRESS OF var-2

var-1 and var-2 are data items,
var-1 is a linkage item,
var-2 is a working-storage, local-storage or linkage (with prior addressability) item

2. SET var-1 to ADDRESS OF var-2

var-1 is a pointer
var-2 is a data item with addressability

3. SET ADDRESS OF var-1 to var-2

var-1 is a linkage item
var-2 is a pointer
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