繁忙
发表于 2025-3-28 15:35:35
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prodrome
发表于 2025-3-28 19:33:01
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缓解
发表于 2025-3-29 00:58:05
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逗留
发表于 2025-3-29 05:41:19
Control Structures: Selection,The last chapter noted that programs that consist only of a sequence of statements are not very useful. To be useful, a program must use selection constructs to execute some statements rather than others and must use iteration constructs to execute certain statements repeatedly.
Salivary-Gland
发表于 2025-3-29 09:46:35
Control Structures: Iteration,The previous chapter dealt with COBOL’s selection constructs: . and .. In this chapter, you examine the last of the classic structured programming constructs: iteration.
nautical
发表于 2025-3-29 12:40:42
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分解
发表于 2025-3-29 18:16:12
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愤世嫉俗者
发表于 2025-3-29 22:32:36
Processing Sequential Files,Previous chapters introduced the mechanics of creating and reading sequential files. This chapter introduces the two most important sequential-file processing problems: control breaks and the file update problem.
Assault
发表于 2025-3-30 02:39:18
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Concerto
发表于 2025-3-30 06:35:14
Advanced Data Declaration,In the last chapter, you learned how to create and use a one-dimensional prefilled table. In this chapter, I continue the discussion of the . clause and demonstrate how you can use it to create a two-dimensional prefilled table.