In teaching system programming courses , it is desirable to have access to a language with good string facilities , control structures sufficient fo r writing structured programs, and a capability for modular programming . When such a language is not available . one way to provide one is to extend a n existing language . In this paper, w e define a powerful extended version o f Basic . discuss methods for implementin g it via a preprocessor ► and provide a listing of an implementation that shoul d make the language available to anyon e having access to ordinary Basic .
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