Storage Classes and Scope

  • Jack Purdum


This chapter examines the various ways that data are made available to your programs by examining how and where that data is stored. The concepts presented in this chapter are important because inadvertent access to a program’s data is a frequent source of program bugs. As a general rule, you want to restrict the access to a piece of data as much as possible. That way, inadvertent changes to the data are less likely, resulting in programs that have fewer bugs.


Data Item Error Message Data Definition Function Block Data Declaration 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Jack Purdum 2015

Authors and Affiliations

  • Jack Purdum
    • 1
  1. 1.Ecosoft, Inc.CincinnatiUSA

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