1. Sequence
imperative / Java
Representation
Collected by Matthias Hauswirth — Compilers (control-flow graphs) and flow charts
Understand concept of a multi-way selection (a conditional statement where the condition is not just a Boolean value, e.g., a switch-statement).
| PL | NM |
|---|---|
| ... | ... |
| switch condition | diamond-shaped node with multiple arrows leaving |
| switch cases | label on arrows coming out of a switch (including 'default') |
The idea of a multi-way 'selection' in structured programming, where a data (the condition's value) is turned into control flow (the next statement to execute).
When introducing switch-statements
Requires prior introduction of 'Selection'.
This is the third in a sequence of "Control Flow as Graph" notional machines:
This notional machine is implemented by the Informa Clicker tool. This tool allows students in a classroom to construct control flow graphs in in-class clicker exercises.
Do you have feedback on this notional machine? Did you find a mistake, or do you have a request for improvement? You can create an Issue on GitHub, where the description is hosted. This way we can see your feedback and address it.
For this, you need a GitHub account. Then follow this link to see the source file of this page. In there, click the ... left of the highlighted line, then pick "Reference in a new issue".
A notional machine is a pedagogic device to assist the understanding of some aspect of programs or programming.
