May 2023
Intermediate to advanced
416 pages
8h 17m
German
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Kapitel 9: Programmverzweigungen und interne Unterprogramme
Über den linearen Ablauf eines COBOL-Programms wurde in den vorangegangenen Kapiteln schon einiges geschrieben. Hier noch einmal zum Verständnis: Ein COBOL-Programm beginnt mit der ersten Anweisung in der PROCEDURE DIVISION und wird dann linear abgearbeitet, bis die letzte Anweisung, die sich am Ende des Programmcodes befindet, ausgeführt wurde.
Mithilfe der in COBOL sehr beliebten GO TO-Anweisung kann frei innerhalb des Quellcodes gesprungen werden. Ein Sprachkonstrukt, das es in modernen Sprachen teilweise gar nicht mehr gibt und das zurecht verpönt ist. Die Verständlichkeit des Programmablaufs lässt dadurch deutlich nach.
Unterprogramme und Schleifen werden in COBOL mithilfe der ...
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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.
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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.