Graphic Display and Manipulation of Tree-Type Data Structures

摘要

The subroutine package TREEPAK is designed to interface a PL/I program with a graphic display unit, allowing display, creation and manipulation of tree structures, while providing the user with a graphic representation of the tree. Facilities include creation of trees from the alphanumeric keyboard and cards, adding and deleting subtrees in existing trees, and saving and retrieving trees. (Author)