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The Other Face

The Other Face. Chapter 15. What documentation is required?. Different levels of documentation are required for the casual user of a program, for the user who must depend upon a program, and for the user who must adapt the program for changes in circumstance or purpose. 1) Purpose.

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The Other Face

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  1. The Other Face Chapter 15

  2. What documentation is required? • Different levels of documentation are required for the casual user of a program, for the user who must depend upon a program, and for the user who must adapt the program for changes in circumstance or purpose.

  3. 1) Purpose • What is the main function, the reason for the program? ( not int main() )

  4. 2) Environment • On what machines, hardware configurations, and operating system configurations will it run? Q: “does this work on mac?”A: “does anything work on mac?”

  5. 3) Domain and Range • What domain of input is valid? • What ranges of output can legitimately appear?“..it’s voice activated?”

  6. 4) Functions realized and algorithms used • What exactly does it do?

  7. 5) Input-output formats • Precise and complete“…so wait.. what do I type here again?”

  8. 6) Operating instructions • Including normal and abnormal ending behavior, as seen at the console and on the outputs. “…is it supposed to do that?”

  9. 7) Options • What choices does the user have about functions? • Exactly how are those choices specified?“…can we do that?”

  10. 8) Running time • How long does it take to do a problem of specified size on a specific configuration? “…shouldn’t it be done by now? ..I think I broke it…”

  11. 9) Accuracy and checking • How precise are the answers expected to be? • What means of checking accuracy are incorporated? “that’s what it says.. but it doesn’t look right”

  12. Test Cases • Test that the program’s main functions with commonly encountered data • Test barely legitimate input data • Test barely illegitimate input data

  13. Flow Chart • Is the flowchart outdated?

  14. Flow Chart (Continued) • Has OOP and the lack of GOTO statements in modern programming helped outdate the flow chart?

  15. Self Documenting • i.e. Comment the code to death

  16. And the most useful documentation techniques mentioned are… • Use a separate job name for each run, and maintain a run log showing what was tried, when, and the results. • Use a program name that is mnemonic but also contains version identifiers (ie. AIM 5.9.3828) • Show relationship to book algorithms (ie. “This is a modified version of Dijkstra’s shortest path algorithm for multiple users”) • Label sections of code (ie. Includes, initializations, etc.) • Use indenting (format it properly) • If the code’s printed, possibly add control flow arrows by hand (from one function to another) • Use line comments only for things that are not obvious • Group things together whenever possible

  17. Das Ende • Fraggen?

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