Mainframe, MVS and zOS Discussion

Pandora-Box wrote:11.When ever we do processing reading a file better to have an approach like this


Templace

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         Open file
         Read file
         process until EOF
                     "MAIN PROCESSING"
                      Read file
         Close file   

Hi,

May be I did not get it but - why do you say so Pandora?

Hi,

Mahesh I believe it more structured way of programming

This been a while but trying to understand it, you mean to use proper indentation?

No, it is the use of what is sometimes called a "Priming Read". If you notice, there are two Reads in the example. One immediately before the loop, and one the last thing in the loop. The code within the loop will only be processed when a record is present. With a Read at the top of the loop, you end up with squirming about to avoid processing a record when you have reached end-of-file.