Prolog Visualization System Using Logichart Diagrams

Details Prolog Visualization System Using Logichart Diagrams Prolog Visualization System Using Logichart Diagrams

2009-03-12

arxiv.org/abs/0903.2207v1

Computer Science

Programming Languages

Paper presented at the 18th Workshop on Logic-based Methods in Programming Environments (WLPE2008, arXiv:0903.1598). Paper sub

Scientific paper

We have developed a Prolog visualization system that is intended to support Prolog programming education. The system uses Logichart diagrams to visualize Prolog programs. The Logichart diagram is designed to visualize the Prolog execution flow intelligibly and to enable users to easily correlate the Prolog clauses with its parts. The system has the following functions. (1) It visually traces Prolog execution (goal calling, success, and failure) on the Logichart diagram. (2) Dynamic change in a Prolog program by calling extra-logical predicates, such as `assertz' and `retract', is visualized in real time. (3) Variable substitution processes are displayed in a text widget in real time.

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