Excerpt from The Pl/I Programming Language Fortran's rigid rules for program formatting. The notion of block structure was taken from Algol 60, while pl/i structures were taken from the record descriptions of Cobol. However, a great many features were added to pl/i that have no counter part in its ancestor languages. An example of a pl/i program is given in Figure l. A program is written as a sequence of external procedures, which are defined in such a way that they can be compiled separately and then linked together when the program is executed. Within an external procedure, there can be internal procedures. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

The Pl/I Programming Language (Classic Reprint)

Science & Math

Paul Abrahams

Mathematics

Forgotten Books

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The Pl/I Programming Language (Classic Reprint)