Structured English From userspeak to programming Plain English

Structured English

From user-speak to programming Plain English User Structured English Pseudocode Analyst Programs Programmer

Modeling Logic with Structured English n n Modified form of English used to specify the logic of information processes Uses a subset of English Action verbs n Noun phrases n No adjectives or adverbs n It should read like English n n No specific standards exist

Structured English Keep the language tight and precise, but clear enough to be readable by the user Blocks indicate general steps; indent for structure Sequence is important Identify areas of decisionmaking (conditions) and repetition See Figure 9 -3 on the right

Writing Structured English n File Names n n n Common verbs n n READ, ACCEPT, GET, WRITE, PRINT, SORT, MOVE, MERGE, ADD, SUBTRACT, MULTIPLY, DIVIDE Common nouns: n n Separate words with hyphens Use Title Case, e. g. Invoice-Record Variable names, attributes, data flow inputs and outputs Focus on how the process converts the inputs to outputs

Writing Structured English Conditions Repetition n n DO statements … UNTIL end-condition n BEGIN IF IF … THEN … n statements … ELSE END IF or or n n DO WHILE statements … END DO n SELECT CASE 1 (conditions) n n CASE 2 … n n statements … END SELECT

P&E 9. 1 n Represent the logic in this table as Structured English

P&E 9. 2 n n See Figure 8 -16, process 5. 0. Write Structured English for this process. See text on page 256 for more information.