Titlebook: Beginning COBOL for Programmers; Michael Coughlan Book 2014 Michael Coughlan 2014

带来的感觉

Data Declaration in COBOL,re all done differently in COBOL than in languages like C, Java, and Pascal. But on the whole, these differences are fairly minor—more a question of nuance than a radical departure. When you are familiar with how iteration and selection work in other languages, COBOL’s implementation requires only a

curriculum

Introduction to Sequential Files, internal focus. It should concentrate on processing data held externally in files and databases rather than on manipulating data in memory through linked lists, trees, stacks, and other sophisticated data structures. Whereas in most programming languages the focus is internal, in COBOL it is extern

WAIL

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序曲

Direct Access Files,ming language provided native support for file organizations of such versatility. Nowadays, the predominance of databases means that the importance of direct access files in modern COBOL programming is greatly reduced. Nevertheless, the huge inventory of legacy programs that still use direct access

quiet-sleep

The COBOL Report Writer,l-break-based report programs. By examining these programs, you are gradually introduced to the new verbs, clauses, sections and concepts of the Report Writer. You see how to use the . entry in the . to specify control-break items and define the basic layout of the page. The chapter explores report

圆桶

OO-COBOL,5 version of COBOL was designed to bring structured programming to COBOL, but failings in the way contained subprograms were implemented meant this version did not fully live up to its promise. However, the structured programming weaknesses of ANS 85 COBOL are remedied by OO-COBOL, and the chapter e

Mortal

Ornithologist

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Creating Large Systems,e monolithic program. Instead, it consists of a main program and many independently compiled subprograms, linked together to form one executable run-unit. In COBOL, a program that is invoked from another program is called a .. In other languages, these might be called procedures or methods.