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Great explaination Jon.
Jon Paris <Jon.Paris@xxxxxxxxxxxxxx> wrote:
On 6-May-08, at 5:23 AM, Riyadi, Agus wrote:
So, it is like if we define as character. Because program A will
receive the
data justify left, even we define as numeric.
Thank's a lots for your help.
You still seem to be missing the point. The program does not
"receive the data". Only a pointer to the data. The _only_
information the called program receives about the parameter is where
it starts in memory. Period - end of story. Nothing about its size
or data type or anything else.
Consequently interpretation of the data is _entirely_ based on the
definition in the called program.
Note that all processing of the parameter within the called program,
actually happens in the memory "owned" by the calling program - that
is why it is critical to match the definitions in order to avoid
corrupting memory.
Again this is not a COBOL thing or an AS/400 thing - it occurs with
any language that passes parameters by reference which includes (for
example) the C language.
Jon Paris
www.Partner400.com
www.SystemiDeveloper.com
midrange.com
