Syllabus Detail

• Structure Charts using Yourdon and Constantine method, 12 ATAR

Background

• Visual analysis of a program helps understand how that program works.
• A structure shows movement of data between modules in a program.
• It is very useful when the developer is talking to the client as a tool to help explain how the program will work.

Structure or design

•  Rectangles are drawn and joined by lines.
• The top rectangle is often called the 'main' module.
• The rectangles under this are other modules or sub-routines.
• These other modules or sub-routines get data from the 'main' module and sometimes return data to it.
• These data flows look a bit odd, they have a small circle at the end of an arrow.
• A white circle is data coupling (data shared by a couple of items/modules)
• A black circle is control coupling (returns a boolean value indicating control). eg Has check been printed = True. Therefore it is a control couple.

Image reference: https://en.wikipedia.org/wiki/Structure_chart

Further Research

• Youtube movie that is worth having a look at. Thank you to...  Christopher Kalodikis.  Published on May 14, 2017

Worksheet and Practice (yet to be added)

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