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Structured Programming With and Without GO TO Statements

In: Selected Papers

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  • Calvin C. Elgot

    (IBM Thomas J. Watson Research Center, Department of Mathematical Sciences)

Abstract

While “Dijkstra flow-chart schemes” (built out of assignment statement schemes by means of composition, if-then and whiledo) are simple and perspicuous, they lack the descriptive power of flow-chart schemes (provided additional “variables” are not permitted). On the other hand, the analogous multiexit composition binary alternation-conditional iteration (CACI) schemes introduced below, which are virtually as simple and perspicuous as Dijkstra schemes, describe exactly the same computational processes as flow-chart schemes (without the aid of additional variables). Theorem 9.1 makes contact with “reducible flow-graphs” an active area in its own right.

Suggested Citation

  • Calvin C. Elgot, 1982. "Structured Programming With and Without GO TO Statements," Springer Books, in: Stephen L. Bloom (ed.), Selected Papers, pages 313-325, Springer.
    • Handle: RePEc:spr:sprchp:978-1-4613-8177-8_10
    DOI: 10.1007/978-1-4613-8177-8_10
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