15 Special Uses of Subfunctions
As we saw in Chapter 14, the most common use of a subfunction is to break a problem into smaller, easier-to-solve subproblems. This is the foundation of recursion, the subject of the first half of this chapter. After we cover recursion, we’ll take a look at another use of subfunctions: directly accessing hardware features in assembly language that may not be easily accessible in a higher-level language.
Recursion
Many computer solutions involve repetitive actions. We saw how to use iteration—while, for, and do-while loops—to perform repetitive actions in Chapter 14. While iteration can be used to solve any ...
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