An application of tree structures to an interactive double-entry bookkeeping system
APL '76 Proceedings of the eighth international conference on APL
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Use of the NMSU EXECUTE enhancement at PCS (since September 1973) has opened the way to many new applications and programming techniques, Most of these applications have been in the area of packages where the user communicates indirectly with APL through a higher-level 'language' tailored to a specific task. One such program is the PCS APL/RJE system. In the RJE system the user is under firm program control with all his inputs in the character input mode. These inputs are scanned with the APL character handling primitives and program control paths are altered to satisfy the request. As the interface languages become more sophisticated, it often becomes useful to create or modify APL programs under program control and cause them to be executed. The enhancement of APL character string manipulation and some programming application areas are the subject of this paper.