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difference between External and Global

 
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smile_rajeev
Beginner


Joined: 28 Oct 2005
Posts: 14
Topics: 9
PostPosted: Wed May 03, 2006 9:01 am    Post subject: difference between External and Global Reply with quote
Hi all,
Cud anyone tell me the difference between External Clause and Global clause in cobol.In what scenarios these two will be used. which is the recommended and oftenly used..
thanks
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vivek1983
Intermediate


Joined: 20 Apr 2006
Posts: 222
Topics: 24
PostPosted: Thu May 11, 2006 10:00 am    Post subject: Reply with quote
Hi,

EXTERNAL clause is used for separately compiled programs. A file that is defined as EXTERNAL can be referenced by any program in the run unit that describes the file.

GLOBAL is used for programs in a nested, or contained, structure. If a program contains another program (directly or indirectly), both programs can access a common file by referencing a GLOBAL file name.




Quote:
which is the recommended and oftenly used


As explained above, based on the scenarios, either of the clauses are used.

Hope this helps.

Regards,
Vivek.G
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