Graph Programming Language One (GPL/I)

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This paper describes a language for handling graphs as a new type of data.This language is called Graph Programming Language One(GPL/I) and is defined as an extension of PL/I.It consists of two kinds of statements that is GPL/I and PL/I.One GPL/I statement is translated into PL/I statements by means of a precompiler (GPL/I compiler) which was developed for IBM System 370/165.In this compiler graphs are represented by one-directional lists and new graphical operations are defined.A sample program to get one spanning tree of a given graph is also shown.

This paper describes a language for handling graphs as a new type of data.This language is called Graph Programming Language One(GPL/I) and is defined as an extension of PL/I.It consists of two kinds of statements,that is,GPL/I and PL/I.One GPL/I statement is translated into PL/I statements by means of a precompiler (GPL/I compiler) which was developed for IBM System 370/165.In this compiler,graphs are represented by one-directional lists and new graphical operations are defined.A sample program to get one spanning tree of a given graph is also shown.

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