Dealing with Changes: Using Functional Decomposition
Look a little closer at the problem of displaying shapes. How can I write the code so that it is easier to handle shifting requirements? Rather than writing one large function, I could make it more modular.
For example, in Step 4c on page 4, where I “Call appropriate function that will display shape, giving it the shape's location,” I could write a module like that shown in Example 1-1.
Example 1-1. Using Modularity to Contain Variation
function: display shape
input: type of shape, description of shape
action:
switch (type of shape)
case square: put display function for square here
case circle: put display function for circle here
|
Then, when I receive a requirement to be able to display ...
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