March 2007
Beginner
526 pages
13h 53m
English
book
Introduction to the New Mainframe: z/VSE Basics
by Wolfgang Bosch, Hans Joachim Ebert, Helmut Hellner, G. M. (Jerry) Johnston, Wilhelm Mild, Ingolf Salm, Joerg Schmidbauer, Martin Walbruehl, Mike Ebbers
Content preview from Introduction to the New Mainframe: z/VSE Basics
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Chapter 10. Compiling and link-editing a program on z/VSE 255
A
subroutine is a commonly called routine that performs a predefined function.
The purposes behind a copybook member and a subroutine are essentially the
same: to avoid having to code something that has previously been done.
However, a subroutine is a small program (compiled, link-edited, and executable)
that is called and returns a result, based on the information that it was passed. A
copybook member is just text that will be included in a source program on its way
to becoming an executable program. The term
copybook is a COBOL term, but
the same concept is used in most progr
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.