Chapter 2. A Crash Course in UML State Machines
One place we could really use help is in optimizing IF-THEN-ELSE constructs. Most programs start out fairly well structured. As bugs are found and features are grafted on, IFs and ELSEs are added until no human being really has a good idea how data flows through a function. Pretty printing helps, but does not reduce the complexity of 15 nested IF statements.
—Jack Ganssle, “Break Points,” ESP Magazine, January 1991
Traditional, sequential programs can be structured as a single flow of control, using standard constructs such as loops and nested function calls. Such programs represent most of the execution context in the location of the program counter, in the procedure call tree, and in the temporary ...
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