May 2023
Intermediate to advanced
416 pages
8h 17m
German
Content preview from COBOL - Altsysteme warten und erweiternBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Kapitel 2: Programmstruktur und grundlegende Sprachelemente
Die meisten Programmiersprachen erlauben die Definition von Variablen, Konstanten und Dateien, aber auch die Codierung von ausführbaren Anweisungen an beliebigen Stellen im Quellprogramm. In COBOL sieht es dagegen anders aus. In diesem Kapitel werden die Struktur und die Elemente eines COBOL-Programms beschrieben, sodass Sie sich in einem bestehenden COBOL-Programm leichter zurechtfinden.
2.1 COBOL-Programmstruktur
In der Programmiersprache COBOL hat man für Übersicht im Quellprogramm gesorgt, indem man das Quellprogramm in vier Programmteile, DIVISIONs genannt, untergliedert hat. Jedem Programmteil wurde ein fester Name als Überschrift und ein Verwendungszweck gegeben:
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.