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Published in:
2009 | OriginalPaper | Chapter
Recursive Programs
Published in: Verification of Sequential and Concurrent Programs
Publisher: Springer London
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While Programs, Discussed in the previous chapter, are of course extremely limited. Focusing on them allowed us to introduce two basic topics which form the subject of this book: semantics and program verification. We now proceed by gradually introducing more powerful programming concepts and extending our analysis to them. Every realistic programming language offers some way of structuring the programs. Historically, the first concept allowing us to do so was procedures. To systematically study their verification we proceed in two steps. In this chapter we introduce parameterless procedures and in the next chapter procedures with parameters. This allows us to focus first on recursion, an important and powerful concept. To deal with it we need to modify appropriately the methods introduced in the previous chapter.