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| Content Provider | ACM Digital Library |
|---|---|
| Author | Wei, Yin-min Howell, Edgar |
| Abstract | There are a variety of views about structured programming, and thus a number of ways to describe it. However, we all know that a well structured program must be easy to read and easy to modify. As a consequence, modularity become a central concept in structured programming.Automobiles are assembled from components (i.e. modules) instead of individual parts, so that their structure look simple, and thus easier for auto - mechanics to handle the necessary repairs.The human ability in handling complexity is limited by their short term memory capacity, which has been known to range from 5 to 9 simultaneous facts. However, computer programs contain statements presented on a medium such as paper, and Nobel-prize winner psychologist Herbert Simon once suggested that the short term memory capacity on paper for humans exceeds that in human brain.The short term memory capacity has been used successfully, in our class, as a guideline in setting the size for program modules. The readability of the student programs was markedly improved, and thus greatly reduced the time needed for grading the programs.A main program usually contains a larger number of declarations (non-active statements) than that of a sub-program; but each one of them is a program module. Thus, our class had, after discussion, chosen to limit each program module to no more than 12 active statements. As a result, the student programs were much easier to read.We are currently studying the possibility of establishing a more comprehensive measure for module complexity that is easy to use. Guided by researches on measuring the readability of natural language texts, we are exploring the following:Counting the number of identifiers declared as constants, types, and variables.Counting the number of operators in each active statement and considering the use of different operators as more complex than the repetition of the same operator.Determining to what extent some active statements, such as DO LOOP and conditional BRANCHes, should be assigned a larger count; because they appear to be more complex than assignment statement.These ideas and others will be discussed during our presentation. Colleagues in the audience will be invited to offer their ideas and suggestions for further studies.Note: A part of this paper's content was presented by Yin-min Wei at the 1985 Ohio Computer Science Colleague's Conference, Bowling Green State University, Ohio. |
| File Format | |
| ISBN | 0897912187 |
| DOI | 10.1145/322917.324023 |
| Language | English |
| Publisher | Association for Computing Machinery (ACM) |
| Publisher Date | 1987-02-01 |
| Publisher Place | New York |
| Access Restriction | Subscribed |
| Content Type | Text |
| Resource Type | Article |
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