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Complete CL: The Definitive Control Language Programming Guide, Fourth Edition by Ron Hawkins, Doug Pence, Ted Holt, Kevin Forsythe, Ernie Malaga

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Appendix G. For S/36 Programmers

As with the System/38, there are few System 36 shops in existence anymore. But you may inherit old S/36 code and as such may have to convert OCL to CL. This appendix will help you understand the differences. CL didn’t exist on the System/36. All program control was written in Operation Control Language (OCL).

OCL is rather simple. The challenge to updating it is to figure out CL equivalents to tricks and techniques in OCL.

Interpreted versus Compiled Languages

Because OCL is an interpreted language, it is never compiled. You write the code and execute it. The system must read the source code and interpret it each time the source program is executed.

For programmers, interpreted languages are comfortable, but they usually ...

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