May 2011
Intermediate to advanced
800 pages
39h 19m
German
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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.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.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.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.
R1.37 Eigenständige Klassenmodule kennen lernen
Aufgabe
Sie wollen die Arbeit mit Klassenmodulen an einem einfachen und plausiblen Beispiel kennen lernen und üben.
Lösung
Auf der Suche nach einer plausiblen Demoklasse fällt unsere Wahl auf das geometrische Gebilde »Kreis«. Ein Kreis hat die Eigenschaften radius, umfang, fläche. Wir wollen noch eine Methode zeichneMich hinzufügen, die allerdings nur für Reports funktioniert[5].
Zu Beginn machen wir uns Gedanken über die von der Klasse benötigten Zustandsvariablen, diese müssen nicht identisch mit den Eigenschaften sein! In unserem Fall brauchen wir nur eine einzige (private) Zustandsvariable r. Warum? Wie die folgende Tabelle zeigt, lassen sich alle drei Eigenschaften (Radius, Umfang, Flaeche) auf ...
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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.